Originally posted by Socratism
The "geologic age" idea is probably flawed. Now if you could show the same thing at one vertical location that would be far more compelling.
Ok, I will do it. This is a well from the Williston Basin. It has rocks from all ages there in vertical succession. There are 8 layers of desiccation cracks vertically above one another. (you should be careful what you ask for)
Here is the depths from a well in Montana in the deepest part of the basin. I have interspersed the comments from my web page and other sources. My web page is
http://home.entouch.net/dmd/geo.htm The footage is the depth the formation is found in the W. H. Hunt Larsen #1 well in Montana:
Tertiary Ft. Union Fm ..........................100 feet
Cretaceous Greenhorn Fm .......................4910 feet
Cretaceous Mowry Fm........................... 5370 feet
Cretaceous Inyan Kara Fm.......................5790 feet
Jurassic Rierdon Fm............................6690 feet
Triassic Spearfish Fm..........................7325 feet
"A continental mode of deposition is suggested by the red color of the sediments. This color suggests oxidation, possibly resulting from periodic wetting and drying (Barchyn, 1982, 1984). This is further substantiated by desiccation <cracks in the shaly interbeds. The anhydritic nature of the sediments also suggests periodic emergence of the depositional surface."Richard D. Le Fever, Julie A. Le Fever, "Newburg and South Westhope Fields--U.S.A. Williston Basin, North Dakota" in TR: Stratigraphic Traps II, 1991, AAPG, p. 177
Permian Opeche Fm..............................7740 feet
"The products of the desiccation stage are desiccation <cracks> in halite and red sediment, microcrystalline salt crust, intergranular and pipe-filling halite cement, and displacive halite and anhydrite crystals. "Kathleen Counter Benison (1), Robert H. Goldstein, "Sedimentology of Ancient Saline Pans: An Example from the Permian Opeche> Shale, Williston Basin, North Dakota, U.S.A." Journal of Sedimentary Research, Section A: Sedimentary Petrology and Processes Vol. 70 (2000), No. 1. (January), Pages 159-169
, p. 166
Pennsylvanian Amsden Fm........................7990 feet
Pennsylvanian Tyler Fm.........................8245 feet
Mississippian Otter Fm.........................8440 feet
Mississippian Kibbey Lm........................8780 feet
Mississippian Charles Fm.......................8945 feet
Mississippian Mission Canyon Fm................9775 feet
Mississippian Lodgepole Fm....................10255 feet
Devonian Bakken Fm............................11085 feet
Devonian Birdbear Fm..........................11340 feet
"Birdbear formation with desiccation, caliche development (caliche is widespread in west Texas- a dry area) and burrows. (Ehrets and Kissling, 1983, p. 1336; Halabura, 1983, p. 121) " my web page
and
"Devonian events include early cementation of desiccation structures and intergranular spaces, localized vuggy and moldic porosity development, and dolomitization and formation of intercrystalline porosity." Gerald C. Blount, "Stratigraphy, Depositional Environments, and Diagenesis Related to Porosity Development and Destruction in Jefferson Formation, Northwestern Montana: ABSTRACT" AAPG, Aug.1986, p. 1032
Devonian Duperow Fm...........................11422 feet
Devonian Souris River Fm......................11832 feet
Devonian Dawson Bay Fm........................12089 feet
"This study shows that the mudstone was deposited in environments that ranged from saline- and dry-mudflat to distal alluvial-eolian plain, and that the dolostone formed in a Coorong-like environment. New evidence shows that the lower Burr Member was deposited in an oxygen-restricted environment. Data indicate that the environment in central Saskatchewan was more oxygen- restricted. From base to top, the depositional environment of the Neely Member changed from relatively deep, offshore settings, through higher energy, shallower water conditions represented by domical stromatoporoids, to intertidal and supratidal conditions. The Hubbard Evaporite Member was deposited in salt pan to saline mudflat environment, and the overlying First Red Bed formed in environments that ranged from saline mudflat, dry mudflat to distal floodplain. " C. Gu, Ph.D. thesis, 1998; DISS. ABSTR. INT., SECT. B v.59, no.6, p.2633-B, Dec. 1998.
Devonian Prairie Fm...........................12180 feet
Devonian Winnipegosis Grp.....................12310 feet
"The lower Devonian is the Winnepegosis formation and it consists of a bioclastic (meaning made up of the shells of dead carbonate producing animals) limestone, and the upper part is interbedded carbonate with anhydrite. Mud cracks are also found as are burrows.(Perrin, 1983, p. 54, 57.) There is no sand, no shale so it is hard to see how this could be the flood deposits. Anhydrite is an evaporitic mineral and not compatible with a global flood." My web page
Silurian Interlaken Fm.........................12539 feet
"This formation consists of carbonates, anhydrite, salt, with minor amounts of sand. Layers throughout this deposit are also burrows and mudcracks from drying out of the layers (Lobue, 1983, p. 36,37). There are also intact corals of a totally different type than are alive today. The Paleozoic corals are belong to one of three groups - only one of which is found in Mesozoic rocks; the other two became extinct at the end of the Paleozoic. The four-sided corals are only found in the Paleozoic. Modern corals of the 6-sided or 8-sided kind are not found until the Triassic. " my web page
Ordovician Stonewall Fm.......................13250 feet
Ordovician Red River Dolomite.................13630 feet
"Dense dolomites are present well down in the Red River, and in the outcrop area immediately to the north abundant mud cracks (desiccation cracks?) and ripple marks in the Red River dolomites were reported by Byers (1957, p. 27) and Byers and Dahlstrom (1954, p. 70). " J. W. Porter, J. G. C. M. Fuller, "Lower Paleozoic Rocks of Northern Williston Basin and Adjacent Areas" AAPG Bulletin, Jan. 1959, p. 154
Ordovician Winnipeg Grp.......................14210 feet
Ordovician Black Island Fm....................14355 feet
Cambrian Deadwood Fm..........................14445 feet
Precambrian...................................14945 feet
So, Socratism, can you explain this? At least 8 levels of desiccation cracks in the Williston basin all vertically in one place. How does this happen in the flood?
Here are more multiple level, vertically superposed mud crack horizons:
frenchman flat sections
mudcracks at bottom
then pebbly sandstone
then burrows in shale then sandstone (pebbly)
then dark grey sandstone (crossbedded)
then redbrown breccias and conglomerate
then burrows
then stromatolites
then red mudstone with mudcracks
then plant remains at top
Martin H. Link and Robert H. Osborne "Lacustrine facies in the
Pliocene Ridge Basin Groups: Ridge Basin, California" in Modern
and Ancient Lake Sediments ed. by Albert Matter and Maurice E.
Tucker London: Blackwell Scientific Publications 1978 p. 178.
I can find lots and lots more of these examples.