Last Season Of Kaibab Formation Age Special Edition
It is composed primarily of a sandy limestone with a layer of sandstone below it. Either the kaibab limestone or toroweap formation overlies the coconino sandstone.
Kaibab formation rather than kaibab limestone accepted on this map in the plateau sedimentary province where kaibab is composed of dolomite dolomitic sandstone sandstone and dolomitic limestone.
Kaibab formation age. Kaibab formation permian period 270 million years old 350 feet thick light gray to tan cliff at the canyon rim. For example one publication may say that the kaibab formation is 270 million years old while another says 255 million years old. The coconino sandstone is typically buff to white in color.
270 million years ago. The kaibab formation consists of marine limestone and siltstone that was deposited in a shallow tropical sea and coastal flats on the west coast of the supercontinent pangaea. The kaibab formation is about 255 feet thick in the southern butte mountains near robbers roost bissell 1964 and varies from 77 to about 550 feet in the butte mountains bissell 1964.
The color ranges from cream to a greyish white. Coconino sandstone permian period 280 million years old 350 feet thick tan to nearly white prominent vertical cliff. Kaibab is a southern paiute indian word meaning mountain lying down.
Early paleontological studies of the kaibab limestone firmly established its age on the basis of the abundant fossils that it and the underlying toroweap formation contain. The same inconsistencies arise for the other rock units in the park. At best readers are left wondering which are the correct or best ages and why.
Fossils found are of organisms that lived in the permian seas including brachiopods which resemble clams ammonites shelled cephalopods which resembled the modern nautilus bryozoans filter feeding organisms similar to coral crinoids marine animals also known as sea. The environmental setting for the kaibab limestone was a shallow marine shelf deposit that represents the time of maximum eastward transgression of the. Kaibab limestone this layer averages about 250 million years old and forms the surface of the kaibab and coconino plateaus.
Of early permian age. The difference in thickness is attributed to erosion. On the basis of its brachiopod and siliceous sponge faunas it was initially concluded that it is leonardian approximately kungurian latest early permian in age.
It consists primarily of fine well sorted quartz grains with minor amounts of potassium feldspar grains deposited by eolian processes wind deposited approximately 275 million years ago. The kaibab formation in capitol reef national park is only 0 200 thick and but thickens to 300 500 in the grand canyon morris 2003. Gnu records usgs dds 6.
Kaibab formation toroweap formation coconino sandstone hermit formation supai group redwall limestone tonto group muav limestone bright angel shale tapeats sandstone vishnu complex. In some places sandstone and shale also exists as its upper layer. The kaibab formation was named after the flat kaibab plateau.
