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Here are photos of two trips taken to look for Paleozoic fossils in northern Gila County in northern Arizona. Daily thunderstorms and plentiful shade made the 90 deg. + temperatures bearable. I ran into TFF member ArizonaChris while in the area. In the Martin Formation I found interesting stromatoporoids, now determined to be sponges, that were important reef forming organisms during the Late Devonian. Pine needles for scale. Here are some silicified Martin Formation brachiopods. Nearby are many caves and sinks in the fossiliferous limestones of the Martin and Redwall Formations: up to 100 miles of passages according to a caver. The first one is full of junk metal including two cars. Any idea what the cars are? Here is Tin Can Sink. To be continued.
I was exploring a canyon south of Globe, Arizona in the Mescal Mountains where I found two bones in the Devonian Martin Formation, (Frasnian Age, 372-383 mya). Do you agree that they are bones? If so, what type of bones from what creature? I see that the only vertebrates in existence were fish and possibly the earliest tetrapods. See table of Arizona vertebrate fossils found in: DAVID K. ELLIOTT and RONALD C. BLAKEY, “THE PRE-PERMIAN VERTEBRATE RECORD IN ARIZONA”, Heckert, A.B., and Lucas, S.G., eds., 2005, Vertebrate Paleontology in Arizona. New Mexico Museum of Natural History and Science Bulletin No. 29. 19 mm diameter US penney for scale. Photo P1020698 left side detail of Photo P1020702 Photo P1020702 I have several detailed photos of this one if needed. Photo P1020705 Second bone I found on top of same layer a few feet away. Same animal?
I collected these silicified stromatoporoids from the Devonian, Frasnian Age, Martin Formation north of Payson, Arizona. The spires are 2-4 mm high and have bases 1 to 1.5 mm wide. Hexagoneria and Pachyphyllum corals occur with these. The first photo may be a difference species from the last photos since the spires are lower. Any idea what species these stromatoporoids might be?