inyo
noticing nice landscape pebbles
Member since September 2014
Posts: 85
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Post by inyo on Oct 19, 2023 10:42:16 GMT -5
The place lots of paleontology aficionados call Extinction Canyon, situated within Nevada's Great Basin Desert, is especially noted for producing locally common whole and mostly complete early Cambrian trilobites. Other extinct organisms often found in an excellent state of preservation in the general vicinity of the canyon's corridor include: graptolites (usually considered an early hemichordate); hyolithids (a lophophorate tangentially related to Brachiopoda, Bryozoa, and possibly phoronid annelids); Caryocaris crustaceans; a tabulate coral; archaeocyathids (early calcareous sponge;salterella (small ice cream cone-shaped fossil assigned to its own unique phylum called Agmata--it never survived the early Cambrian); Lidaconus (a diminutive tusk-shaped shell of unestablished zoological affinity that went belly-up near the conclusion of the early Cambrian); and Girvanella algal nodules precipitated by a species of photosynthesizing cyanobacteria.
Needless to report, Extinction Canyon is a genuine ne plus ultra paleontological district, indeed.
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Mark K
Cave Dweller
Member since April 2012
Posts: 2,585
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Post by Mark K on Oct 19, 2023 16:37:54 GMT -5
I know a spot where almost every rock has at least one in it. I found two Eurypterids so far as well.
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Post by jasoninsd on Oct 19, 2023 21:03:59 GMT -5
Wow! Thanks for posting a link to that page! I don't have it in me to read it tonight...but it definitely looks like a good read!
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