DPS Ammonite Posted May 28, 2020 Share Posted May 28, 2020 I took my first long trip (more than 15 minutes) to search for Permian fossils in the Kaibab Limestone of central Arizona near Pine. I have previously only collected silicified fossils that had been transported south of the Mogollon Rim by streams. The Kaibab is known for two silicified fossils that are great index fossils for the Leonardian (Kungarian) Age across western US: Peniculauris bassi, a brachiopod and Actinocoelia maeadrina, a sponge. At first I was disappointed because I have heard that you could collect hundreds of each type in a short period of time. However I found a couple of sponges with the best 3 D texture that I have seen on the internet. They each are each about 13 cm in length. I will take quality over quantity any day. The Peniculauris bassi brachiopod is about 5 cm wide. I also found some very detailed echinoid spines (3.5 cm field of view). I will have to go back to the top of the Rim to collect more types of fossils. I only have a few hundred square miles of Kaibab to search, exclude that near the Grand Canyon. Good reference on Actinicoelia maeadrina: Griffin LR (1966) Actinocoelia maeandrina Finks, from the Kaibab Limestone of northern Arizona. Brigham Young Univ Geol Stud 13: 105–108 http://geology.byu.edu/home/sites/default/files/actinocoelia-maeandrina-finks-from-the-kaibab-limestone-of-northern-arizona-leland-r.- 10 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
TqB Posted May 28, 2020 Share Posted May 28, 2020 A fine haul, those sponges are gorgeous. Tarquin Link to comment Share on other sites More sharing options...
Al Tahan Posted May 28, 2020 Share Posted May 28, 2020 I love those echinoid spines! Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 28, 2020 Share Posted May 28, 2020 Love the brachiopod and the sponges! Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
FossilNerd Posted May 28, 2020 Share Posted May 28, 2020 Those sponges are awesome! The good thing about science is that it's true whether or not you believe in it. -Neil deGrasse Tyson Everyone you will ever meet knows something you don't. -Bill Nye (The Science Guy) Link to comment Share on other sites More sharing options...
Monica Posted May 30, 2020 Share Posted May 30, 2020 That's a nice, big brachiopod - wow! And the sponges are terrific - thanks for showing us! Link to comment Share on other sites More sharing options...
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