Journal of Creation 20(1):72–78, April 2006
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The geologic setting of the Green River Formation
Further evidence is presented that the Green River Formation (GRF) was deposited after the Flood following the tectonic uplift of Psalm 104:8. A shift from continental-wide to regional sedimentation patterns within local basins makes this clear. Additional evidence suggests the GRF was deposited in a warm lacustrine ecosystem over a period of hundreds of years, suggesting the need to re-evaluate post-Flood climate models. Sedimentological, stratigraphic and structural evidence suggest pediments, developed on GRF basin fills, could not have formed until well after the Flood. For now, creationists should abandon the use of paleontological criteria (index fossils) in defining the post-Flood boundary and focus on sedimentological and stratigraphic criteria instead.
This article is primarily a response to Oard’s1 first submission of this forum. It is impossible to respond to every point in his original article because of the focus of this forum and space limitations. I will respond to what I believe are his most serious objections to the Green River Formation (GRF) being post-Flood. Additional evidences will be presented that the GRF and its associated basin fills are post-Flood. Several solutions are suggested for the apparent contradiction between the warm post-Flood environment indicated by the GRF and the cool post-Flood climate model developed by Oard. In this paper, I develop criteria which can be used to define the post-Flood boundary independently of index fossils. This approach may be a significant step forward in understanding the ‘geologic column’ and its associated fossils in other areas of the world, and may help to resolve some of the controversy related to the post-Flood boundary.
Shift in sedimentation patterns
In examining the geologic column of west-central North America, we note a tremendous shift in stratigraphic sedimentation patterns from the Mesozoic to the Cenozoic. Mesozoic sections are dominated by marine deposits which are continent-wide and laterally continuous, compared to the lesser-scale, stratigraphically-isolated, regional deposits of the Cenozoic2 (like the GRF). These Mesozoic deposits stratigraphically and unconformably underlie the GRF.3–8 I believe the best explanation for this shift in sedimentation scale (from continental-wide to regional) is the end of the global Flood catastrophe. The unconformity found below the Green River Basins (typically below the basal member of the Wasatch) likely represents Flood water flowing off the continents as the surrounding mountains were uplifted and the basins were formed (Psalm 104:8). The Green River basins, and likely many of the other basins throughout west-central North America (figure 9*), are best explained as basins that developed and started to fill as a result of the processes in Psalm 104:8. The shift from continent-wide to regional sedimentation patterns indicates we are clearly past Genesis 7:20, the point at which the floodwaters reached their maximum height. The complete absence of marine fossils in the basins also suggests the Flood had retreated by the end of the Mesozoic in this area.2
Rapid accumulation of basin fills
It has been demonstrated that the ‘varves’ of the GRF (evidence often cited for millions of years of sedimentary activity) cannot be annual.9,10 As argued in my first submission,11 fish taphonomy, multiple layers of stromatolites and caddisfly mounds argue that the sediments must have taken more than weeks to be deposited. Evidence for longer periods of time also occurs stratigraphically higher, in the Bridger Formation, where turtle preservation patterns argue for time much longer than weeks.12 Each turtle mass mortality layer (at least four are reported) indicates that weeks (probably months) passed to explain the taphonomic absence of turtle heads and limbs, but the presence of articulated shells. Whereas articulated turtle shells indicate they were not exposed for long periods of time (years) before burial.
There are no scriptural mandates against post-Flood catastrophism. Indeed, we still have geologic catastrophes in today’s world (consider the 2004 Indian Ocean tsunami or the Missoula flood13). Fossil fish,14 coprolites,15 large ball and pillow structures5 (figure 31), intrastratal hydroplastic flow16 (figure 32) and convoluted beds17,18 all argue for rapid accumulation and subsequent lithification of thick sedimentary layers within the GRF. I suspect it took less than a few hundred years for the Green River Basins to fill. In the future, creationists should look for vertical patterns in the GRF (such as fish taphonomy,14 fish scale patterns,19,20 pollen and leaves) which might indicate seasonal changes that can in turn be interpreted as yearly deposits. This would help us calculate how much time the sediments of the GRF actually represent.
The margins of the Green River basins consist of clastic sediments and sedimentary structures consistent with deltaic, fluvial and alluvial settings.11 The sediments include thick accumulations of sandstones and conglomerates which interfinger with fine-grained lacustrine sediments.7 For example, in the northern Green River Basin, the GRF laterally interfingers with the Wasatch, which in turn grades into the Pass Peak Formation, an alluvial conglomerate possibly up to 975 m thick!21 As the basins filled, clastic sediments (represented by the Bridger and Wasatch Formations) eventually transgressed over the lacustrine deposits below.
The bulk of the Green River basins are filled with carbonate sediments, mostly in the form of calcimicrite. Lake carbonates have several sources including: inorganic, photosynthetic induced, biogenic and detrital.22,23 Biogenic microbial carbonates are poorly understood24–26 and may be an underappreciated source for many of the GRF carbonates. Large algal blooms, coupled with warm water, can decrease the amount of CO2 in lakes leading to supersaturation and precipitation of calcite.23 If post-Flood CO2 concentrations were high, they may have contributed to large algal blooms. Increased post-Flood CO2 levels could have resulted from massive biological decay and volcanic activity. These types of processes may explain both the rich accumulation of organics and carbonates in the GRF. Models arguing the Green River sediments were catastrophically deposited as turbidites or some other mass flow process15 are easily rejected based on sedimentological and paleontological criteria.14 Buchheim and Eugster27 developed a model explaining the origin of laminated calcite/organic rich couplets within Fossil Basin (figure 33). Independent methods of determining accumulation rates (discussed above) will have to be used to determine if this model can explain the basin filling in a short period of time.
Rapid erosion of filled basins
As I suggested in my first submission,11 rivers could not begin to erode the sediments of the basins, until the basins had been completely filled. After filling, regional rivers could transverse former drainage divides, and exhumation could begin. This sequence of events is supported by sedimentology. The GRF is stratigraphically followed by the deposits of the Bullpen member of the Wasatch Formation and the Bridger Formations. Occasional shallow lakes still persisted during this time.12,28 It is likely the rivers, which deposited fluvial material on top of the GRF, eventually were able to cut down through it. Sedimentology of the Bridger Formation indicates the area was still tectonically and volcanically active,28 likely leading to increased erosion rates. Increased erosion rates have been noted in such regimes today.29 Geomorphic changes in unconsolidated sediments can proceed rapidly until dynamic equilibrium is reached within the landscape.30 It is likely the Bridger and Wasatch were unstable because multiple landslide deposits of these formations are common.31 Creationists have noted many other examples of modern rapid erosion rates and canyon formation.13,32,33
Where have all the eroded sediments of the GRF gone? They have been transported downstream into the Colorado River drainage basin. The eroded sediments of the Green and Colorado drainage basins can now be found in the extensive Colorado River delta deposits of the Imperial and Diablo Formations along the California/Mexico border.34,35
The climate of the Green River Formation
Climate inferences for the GRF are based on multiple lines of evidence from paleontology and sedimentology.5,36–39 Fossil pollen and fish indicate a relatively warm environment, perhaps with cool winters. Isotopic evidence suggests significant winter snowfall was present in the Uinta Mountains during deposition of the GRF.40 This helps explain the paradox of mixed subtropical and cool elements that Oard suggested was a signature of Flood deposition.1 The large accumulation of carbonate sediments, strongly argues for a warm climate, as calcium carbonate readily dissolves in cold water.23 Because nearly complete ecosystems are represented37,41 and taphonomy doesn’t indicate transport14 it appears the fossils are valid climatic indicators.
In contrast, Oard’s post-Flood glaciation model suggests cool climates and glacial development immediately followed the Flood.42 Since the Green River Basins are deep in the continental interior, at about 40° N in latitude, and currently at relatively high elevations (>2,000 m), post-Flood climate models don’t agree with the climate actually indicated by the fossils and sedimentology. These ideas need to be tested, but here are several solutions, which may partially explain the enigma:
Perhaps post-Flood climate models are wrong. Dramatic cooling and glacial development may not have occurred until several hundred years after the Flood. The rocks of the Green River Basins are partially covered by glacial moraines sourced from the higher, Uinta Mountains.31 So glaciation did develop, but not until the Green River Basins had been well established and mostly filled.
Perhaps the entire region was vertically uplifted, a second time (the first was Psalm 104:8) after the deposition of the Green River Basin fill. While at lower elevation, warmer climates could be sustained. Renewed uplift might also help explain the massive exhumation that has occurred throughout much of the Green River Basins.
Too much post-Flood volcanic activity presents a problem for a relatively warm climate as massive volcanic activity would produce too much worldwide cooling.43 Perhaps there were some other atmospheric factors that contributed to an extended, warm, post-Flood, continental climate, despite volcanic activity. Could the heat produced from cooling igneous plutons (to the west) or extremely warm oceans have been enough to offset the cooling effects of volcanic gases? Could excessive amounts of CO2 (produced by biomass decay and volcanic activity), have offset the effect of volcanic aerosol cooling? CO2 is a ‘greenhouse’ gas that traps infrared heat and prevents it from leaving the atmosphere. Factors like these may have offset the cooling effect of volcanic aerosols longer than predicted.42
Did hot springs and large post-Flood pluvial lakes42,44,45 play a significant role in moderating the climate of the west-central United States? It is known that large bodies of water play significant roles in climate moderation. Sloan and Barron46 found it was impossible to generate warm climates in the west-central United States during the Eocene with their initial climate model. However, four years later, when Sloan47 considered the moderating effect that a large lake(s) could have on climate (the Green River lakes), he found the climate could be ‘equable’. In my post-Flood model, the Green River lakes would be present at about the same time as all of the pluvial lakes (figure 34), to the west in California, Nevada and Utah. The moderating effect of these lakes may have been significant, especially if they developed immediately following the Flood as Oard42 and others44 have suggested.
There is evidence of springs within the sediments of the GRF.48–50 If these springs were hot (as many springs in Wyoming are today), perhaps they added to the moderating effect of these lakes.
Pediments and quartzites
As discussed earlier, the Cenozoic basins are regional deposits, only rarely connected stratigraphically with each other,2,8,51 implying that they formed well after the final retreat of floodwaters that had covered the entire region. The basins formed (and filled) as a result of tectonically exposed highland areas all around them. Sedimentary current directions indicate radial fill patterns from the edges to the centres of the basins. In order for this to happen, the uplift of Psalm 104:8 must have already occurred and floodwaters must have already retreated. With this scenario, it is impossible for the pediments superimposed on the Green River basins to have formed as a result of retreating floodwater!
If I understand Oard’s pediment model correctly,52 he believes most pediments formed as a result of lateral erosion by retreating floodwater flowing around mountains and other highland areas at the end of the Flood (after the deposition of most of the Cenozoic). The problem with this mechanism, at least in the Green River basins, is that you can’t have free flowing currents from one basin to another carving the pediments if the basins are already present. The basins are enclosed by mountain ranges and there is nowhere for the currents to go except toward basin centres! If it was possible for draining floodwater currents to flow from one basin to another, the basins should be widely connected stratigraphically; they are not. It is impossible to explain the GRF pediments by retreating floodwaters. In this case, the stratigraphy of the underlying rocks do not support that the pediments were cut as mountains were uplifted and floodwaters drained off the continents (Psalm 104:8). We need to look below the basins for the unconformity cut by retreating floodwaters, not on top of them. Indeed, the Green River and other equivalent basins are underlain by a quartzite covered unconformity,8,53,54 which likely represents retreating floodwaters. Froede55 seems to agree that the Late Cretaceous of the area (which underlies many of these basins) marks the beginning of Flood water retreat. The Green River pediments must have formed by some other, still unknown, mechanism.
It is unlikely that the quartzites we found covering some pediment-like surfaces in the GRF came from central Idaho during pediment formation. As argued above, the mountains had to exist in order for the basins to fill with sediment. The pediments (covered with quartzites) had to form after the basins were filled and started to erode. How can quartzites be transported over all the mountain ranges between Idaho and Wyoming? A much better source for the quartzites is the Uinta Mountains in the immediate proximity to all of the Green River Basins56,57 or from Precambrian and Paleozoic thrust sheets to the west.56
Defining the Flood/post-Flood boundary
Some work has been completed on how the Flood/post-Flood boundary should be defined.52,58–60 However, this task has proved difficult. Before the boundary can properly be recognized and applied worldwide, we need to come to grips with how much post-Flood catastrophism, erosion and diversity within living things is possible. Brand61 has proposed an excellent model (figure 35) for how we should approach these types of questions. This approach can be used to develop and test criteria used in defining the boundary. It can also be used to help us to decide the parameters of post-Flood catastrophism and the biological limits of diversity.
Holt,59 Oard58 and others have listed valid concerns for interpreting most of the Cenozoic as post-Flood. However, the mistake I believe they make is they are assuming the ‘Eocene’ in Wyoming was deposited at the same time as ‘Eocene’ everywhere else around the world. This is the same assumption made by conventional geology that makes biostratigraphy possible. What justification do we have as creationists to make such assumptions? Could it be that the Eocene in Wyoming was being deposited at the same time as parts of the Permian or Pleistocene in other parts of the world? To decide this, we need to develop other criteria for boundary determinations (besides using index fossils and absolute ‘position’ within the geologic column). The trap that many have fallen into is that they want to assign the post-Flood boundary to a ‘spot’ in the geologic timescale and then apply it worldwide. We must remember that divisions in the Phanerozoic timescale are based on index fossils, not sedimentology. As creationists we need to start using sedimentological and stratigraphic criteria (as I have done in this submission) to determine the location of the boundary. I think we should shy away from using the geologic column ‘ages’ to define boundaries within the Flood until we better understand the limits of biological speciation and what the sequence of fossils actually represents. The developing field of baraminology62 shows great promise in this area.
I am not saying that paleontology and the order of fossils has no value. However, post-Flood paleontology may be more complicated than we think because of changing populations due to climate shifts. Until we have a better understanding, we should take a safer and much more reliable approach of using sedimentological and stratigraphic criteria in defining Flood boundaries. I commend Oard in starting to use geomorphology to help in the definition of the post-Flood boundary, but the sedimentological and stratigraphic evidence in the rocks below the landscape cannot be ignored.
The post-Flood setting of the GRF was a time, likely hundreds of years in duration, in which the earth was trying to reach a state of equilibrium following tremendous tectonic and climatic changes during the Flood. The sediments of the GRF record rapid depositional events accompanied by tectonic and volcanic activity in a relatively warm, lacustrine ecosystem. The Green River lacustrine sediments (carbonates) interfinger with coarser fluvial and alluvial sediments (clastic) at their margins, as would be expected in such a tectonic setting. Green River basin fills are unconformably underlain by laterally continuous continental-wide marine deposits. This pattern is present because the tectonic uplift of Psalm 104:8 has already occurred, and floodwaters have retreated.
Logic dictates that the basins could not have been filled before they were formed. They formed by the uplift of the surrounding mountain ranges. It is clear the basins were tectonically isolated from one another making pediment formation on GRF deposits by draining floodwaters impossible. Instead, draining floodwaters formed the unconformity found below all the basins. Because glacial sediments stratigraphically overlie the GRF and because of warm climatic indicators, the timing and development of post-Flood glaciation models may need to be reconsidered. Special conditions such as warm, spring fed lakes, pluvial lakes, and cooling igneous plutons to the west may have contributed to moderating the climate of Wyoming after the Flood.
Creationists should abandon the use of paleontological criteria or ‘geologic age’ in defining the location of the post-Flood boundary (at least for now). Instead we should use sedimentological and stratigraphic criteria in determining the cessation of Flood processes. This approach may be a significant step forward in understanding the ‘geologic column’ and its associated fossils in other areas of the world and may help resolve some of the controversy related to the post-Flood boundary. Instead, paleontology should be used to test the development of post-Flood ecosystems and climates.
References and notes
- Oard, M.J., The case for the Flood deposition of the Green River Formation, Journal of Creation 20(1):50–54, 2006. Return to text.
- Dickinson, W.R., Klute, M.A., Hayes, M.J., Janecke, S.U., McKittrick, M.A. and Olivares, M.D., Paleogeographic and paleotectonic setting of Laramide sedimentary basins in the central Rocky Mountain region, Geological Society of America Bulletin 100:1023–1039, 1988. Return to text.
- Dover, J.H., Geologic Map of the Logan 30’ x 60’ Quadrangle, Cache and Rich Counties, Utah and Lincoln and Uinta Counties, Wyoming, Map I-2210, Miscellaneous Investigations Series, U.S. Geological Survey, 1995. Return to text.
- Lamerson, P.R., The Fossil Basin and its relationship to the Absaroka Thrust System, Wyoming and Utah; in: Powers, R.B., (Ed.) Geologic Studies of the Cordilleran Thrust Belt, vol. I, Rocky Mountain Association of Geologists, Denver, CO, pp. 279–340, 1982. Return to text.
- Roehler, H.W., Eocene climates, depositional environments, and geography, Greater Green River Basin, Wyoming, Utah and Colorado, U.S. Geological Society Professional Paper 1506-F:1–74, 1993. Return to text.
- Cole, R.D. and Picard, M.D., Comparative mineralogy of nearshore and offshore lacustrine lithofacies, Parachute Creek Member of the Green River Formation, Piceance Creek Basin, Colorado and eastern Uinta Basin, Utah, Geological Society of America Bulletin 89:1441–1454, 1978. Return to text.
- Roehler, H.W., Early Tertiary depositional environments in the Rock Springs Uplift area; in: DeVoto, R.H. and Bitter, R.K. (Eds.), Sedimentation of Late Cretaceous and Tertiary Outcrops, Rock Springs Uplift, Wyoming Geological Association 19th Field Conference, pp. 140–150, 1965. Return to text.
- Johnson, R.C., Early Cenozoic history of the Uinta and Piceance Creek Basins, Utah and Colorado, with special reference to the development of Eocene Lake Uinta: in: Flores R.M. and Kaplan,S.S. (Eds.), Cenozoic Paleogeography of West-Central United States, Rocky Mountain Section S.E.P.M., Denver, CO, pp. 247–276, 1985. Return to text.
- Buchheim, H.P., Paleoenvironments, lithofacies and varves of the Fossil Butte Member of the Eocene Green River Formation, South-western Wyoming, Contributions to Geology, University of Wyoming, 30:3–14, 1994. Return to text.
- Oard, M.J. and Whitmore, J.H., The Green River Formation of the West-Central United States: Flood or post-Flood? Journal of Creation 20(1):46–49, 2006. Return to text.
- Whitmore, J.H., The Green River Formation: A large post-Flood lake system, Journal of Creation 20(1):55–63, 2006. Return to text.
- Brand, L.R., Goodwin, H.T., Ambrose, P.D. and Buchheim, H.P., Taphonomy of turtles in the Middle Eocene Bridger Formation, SW Wyoming, Palaeogeography Palaeoclimatology Palaeoecology 162:171–189, 2000. Return to text.
- Oard, M.J., Evidence for only one gigantic Lake Missoula flood; in: Ivey Jr, R.L. (Ed.), Proceedings 5th International Conference on Creationism, Creation Science Fellowship, Pittsburgh, pp. 219–231, 2003. Return to text.
- Whitmore, J.H., Experimental Fish Taphonomy with a Comparison to Fossil Fishes, Ph.D. Dissertation, Loma Linda University, Loma Linda, CA, 2003. This work develops the following concepts (from experimental and field evidence): (1) In order for fish to be well preserved, they must be buried within weeks, under most circumstances. (2) Some fossil fish in the GRF are disarticulated, yet with all their elements still present. It indicates days or weeks pass before some fish are buried. (3) Vertical and local patterns of fish preservation may be used to determine relative depositional rates and water depths. (4) Fossil fish do not show preferred orientation (FBQ, CCQ, HCCRT sites) unless they occur near an inflow area (WSQ site). This alone can be used to reject catastrophic deposition hypotheses, such as proposed by Woolley (next reference). Return to text.
- Woolley, D.A., Fish preservation, fish coprolites and the Green River Formation, Journal of Creation 15:105–111, 2001. I believe that Woolley correctly argues that coprolites are evidence of rapid burial. However, like the fish, they occur in many stages of preservation and should not be used to argue the entire section was deposited catastrophically. Return to text.
- Buchheim, H.P., Eocene Fossil Lake, Green River Formation, Wyoming; a history of fluctuating salinity: in: Renaut, R.W. and Last, W.M. (Eds.), Sedimentology and Geochemistry of Modern and Ancient Saline Lakes, Special Publication No. 50, Society for Sedimentary Geology, Tulsa, OK, pp. 239–247, 1994. Regardless of how intrastratal deformation occurs, the beds must be unlithified in order for the deformation to occur, arguing for a relatively short time lapse between deposition of thick sections of strata and subsequent lithification. Return to text.
- Bradley, W.H., Origin and microfossils of the oil shale of the Green River Formation of Colorado and Utah, U.S. Geological Survey Professional Paper 168:1–58, 1931. In this paper, a number of ‘contorted beds’ are reported (pp. 26–28). Regardless of the process that was responsible for distorting the beds, it shows thick section of strata remained unlithified until after deformation. Return to text.
- Sklenar, S.E. and Anderson, D.W., Origin and early evolution of an Eocene Lake System with the Washakie Basin of Southwestern Wyoming; in: Flores, R.M. and Kaplan, S.S. (Eds.), Cenozoic Paleogeography of West-Central United States, Rocky Mountain Section S.E.P.M., Denver, CO, pp. 231–245, 1985. Return to text.
- Steinmetz, B. and Muller, R., An Atlas of Fish Scales and other Bony Structures Used for Age Determination, Samara Publishing, Cardigan, Great Britain, 1991. Like trees, some fish have annular rings on their scales which can be used to determine age. It might be possible to do a study of these ‘rings’ and make some conclusions about depositional rates and seasonal patterns if it can be shown that fish from multiple layers were living at the same time (based on similarities of ring patterns). Return to text.
- Hancock, D.A. (Ed.), The Measurement of Age and Growth in Fish and Shellfish, Australian Society for Fish and Biology Workshop, Lorne, Victoria, 1992. Return to text.
- Steidtmann, J.R., Origin of the Pass Peak Formation and equivalent Early Eocene strata, central western Wyoming, Geological Society of America Bulletin 82:156–176, 1971. Return to text.
- Dean, W.E. and Fouch, T.D., Lacustrine environment; in: Scholle, P.A., Bebout D.G. and Moore, C.H. (Eds.), Carbonate Depositional Environments, American Association of Petroleum Geologists, Tulsa, OK, pp. 97–130, 1983. Return to text.
- Kelts, K. and Hsu, K.J., Freshwater carbonate sedimentation: in: Lerman, A. (Ed.), Lakes: Chemistry, Geology, Physics, Springer-Verlag Inc., New York, pp. 295–323, 1978. Return to text.
- Castanier, S., Metayer-Levrel, G.L. and Perthuisot, J.P., Ca-carbonates precipitation and limestone genesis—the microbiogeologist point of view, Sedimentary Geology 126:9–23, 1999. Return to text.
- Camoin, G.F., Microbial mediation in carbonate diagenesis, Sedimentary Geology 126:1–4, 1999. Return to text.
- Wright, D.T., The role of sulphate-reducing bacteria and cyanobacteria in dolomite formation in distal ephemeral lake of the Coorong region, South Australia, Sedimentary Geology 126:147–157, 1999. Return to text.
- Buchheim, H.P. and Eugster, H.P., Eocene Fossil Lake: The Green River Formation of Fossil Basin, southwestern Wyoming; in: Pitman, J.K. and Carroll, A.R. (Eds.), Modern and Ancient Lake Systems, Guidebook 26, Utah Geological Association, Salt Lake City, pp. 191–208, 1998. Return to text.
- Buchheim, H.P., Brand, L.R. and Goodwin, H.T., Lacustrine to fluvial floodplain deposition in the Eocene Bridger Formation, Palaeogeography Palaeoclimatology Palaeoecology 162:191–209, 2000. Return to text.
- Dadson, S.J. et al., Earthquake-triggered increase in sediment delivery from an active mountain belt, Geology 32:733–736, 2004. Return to text.
- Schumm, S.A., The Fluvial System, John Wiley & Sons, New York, 1977. Return to text.
- Dover, J.H. and M’Gonigle, J.W., Geologic Map of the Evanston 30’ x 60’ Quadrangle, Uinta and Sweetwater Counties, Wyoming, Map I-2168, Miscellaneous Investigations Series, U.S. Geological Survey, 1993. Return to text.
- Williams, E.L., Providence Canyon, Stewart County, Georgia—evidence of recent and rapid erosion, CRSQ 32:29–43, 1995. Return to text.
- Austin, S.A., Rapid erosion at Mount St. Helens, Origins 11:90–98, 1984. Return to text.
- Austin, S.A., How was the Grand Canyon eroded? in: Austin, S.A. (Ed.) Grand Canyon, Monument to Catastrophe, Institute for Creation Research, Santee, CA, pp. 83–110, 1994. Return to text.
- Remeika, P. and Lindsay, L., Geology of Anza-Borrego: Edge of Creation, Kendall/Hunt Publishing, Dubuque, IA, 1992. Return to text.
- Grande, L., Paleontology of the Green River Formation, with a Review of the Fish Fauna,2nd ed., The Geological Survey of Wyoming, Bulletin 63, Laramie, WY, 1984. Return to text.
- Grande, L., Studies of paleoenvironments and historical biogeography in the Fossil Butte and Laney Members of the Green River Formation, Contributions to Geology, University of Wyoming 30:15–32, 1994. Return to text.
- Cushman Jr, R.A., Palynology and Paleoecology of the Fossil Butte Member of the Eocene Green River Formation in Fossil Basin, Lincoln County, Wyoming, Master’s Thesis, Loma Linda University, Loma Linda, CA, 1983. Return to text.
- Wolfe, J.A., A paleobotanical interpretation of Tertiary climates in the Northern Hemisphere, American Scientist 66:694–703, 1978. Return to text.
- Norris, R.D., Jones, L.S., Corfield, R.M. and Cartlidge, J.E., Skiing in the Uinta Mountains? Isotopic evidence in the Green River Formation for snow melt and large mountains, Geology 24:403–406, 1996. Return to text.
- Biaggi, R.E., Paleoecology, Taphonomy and Paleoenvironments of a Unique Littoral Ecosystem within the Eocene Green River Formation of Wyoming, Ph.D. Dissertation, Loma Linda University, Loma Linda, CA, 2001. Return to text.
- Oard, M.J., An Ice Age Caused by the Genesis Flood, Institute for Creation Research, El Cajon, CA, 1990. Return to text.
- Sibley, A., Likely causes of the Ice Age, Journal of Creation 18:83–90, 2004. Return to text.
- Whitcomb, J.C. and Morris, H.M., The Genesis Flood: The Biblical Record and its Scientific Implications, Presbyterian and Reformed, Phillipsburg, NJ, 1961. Return to text.
- Oard, M.J., Frozen in Time, Master Books, Green Forest, AR, 2004. Return to text.
- Sloan, L.C. and Barron, E.J., ‘Equable’ climates during earth history? Geology 18:489–492, 1990. Return to text.
- Sloan, L.C., Equable climates during the Early Eocene: significance of regional paleogeography for North American climate, Geology 22:881–884, 1994. Return to text.
- Bradley, W.H. and Eugster, H.P., Geochemistry and paleolimnology of the trona deposits and associated authigenic minerals of the Green River Formation of Wyoming, U.S. Geological Society Professional Paper 496-B:1–71, 1969. Return to text.
- Mayry, M.S. and Buchheim, H.P., Spring mounds within the Tipton and Wilkins Peak Members of the Eocene Green River Formation: Geochemical and sedimentological influences on Lake Gosiute, Geological Society of America Abstracts with Programs 36(5):288, 2004. Return to text.
- Wiegman, R.W., Spring deposits; surface expressions of the Henry’s Fork fault, Sweetwater County, Wyoming: in: Devoto, R.H. and Bitter, R.K. (Eds.), Sedimentation of Late Cretaceous and Tertiary Outcrops, Rock Springs Uplift, Wyoming Geological Association, 19th Field Conference, pp. 156–158, 1965. Return to text.
- Roehler, H.W., Correlation, composition, areal distribution and thickness of Eocene stratigraphic units, Greater Green River Basin, Wyoming, Utah, Colorado, U.S. Geological Society Professional Paper 1506-E:1–49, 1992. Return to text.
- Oard, M.J., Pediments formed by the Flood: evidence for the Flood/post-Flood boundary in the Late Cenozoic, Journal of Creation 18:15–27, 2004. Return to text.
- Kraus, M.J., Early Tertiary quartzite conglomerates of the Bighorn Basin and their significance for paleogeographic reconstruction of northwest Wyoming; in: Flores R.M. and Kaplan, S.S. (Eds.), Cenozoic Paleogeography of West-Central United States, Rocky Mountain Section S.E.P.M., Denver, CO, pp. 71–91, 1985. Return to text.
- Flores, R.M. and Ethridge, F.G., Evolution of intermontane fluvial systems of Tertiary Powder River Basin, Montana and Wyoming; in: Flores R.M. and Kaplan, S.S. (Eds.), Cenozoic Paleogeography of West-Central United States, Rocky Mountain Section S.E.P.M., Denver, CO, pp. 107–126, 1985. Return to text.
- Froede Jr, C.R., Late Cretaceous epeiric sea or retreating Floodwater? CRSQ 32:13–16, 1995. Return to text.
- M’Gonigle, J.W. and Dover, J.H., Geologic map of the Kemmerer 30’ x 60’ quadrangle, Lincoln, Uinta and Sweetwater Counties, Wyoming, Map I-2079, Miscellaneous Investigations Series, U.S. Geological Survey, Denver, CO, 1992. Return to text.
- Sprinkel, D.A., Park, B. and Stevens, M., Geology of Sheep Creek Canyon Geological Area, northeastern Utah; in: Sprinkel, D.A., Chidsey Jr, T.C. and Anderson, P.B. (Eds.), Geology of Utah’s Parks and Monuments, Utah Geological Association Publication 28, Salt Lake City, UT, pp. 517–528, 2000. Return to text.
- Oard, M.J., Where is the Flood/post-Flood boundary in the rock record? Journal of Creation 10(2):258–278, 1996. Return to text.
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