RWA3006
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Posts: 4,208
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Post by RWA3006 on Oct 30, 2022 22:47:48 GMT -5
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Post by RickB on Oct 31, 2022 7:57:01 GMT -5
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jamesp
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Member since October 2012
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Post by jamesp on Oct 31, 2022 7:59:49 GMT -5
People often have difficulty understanding why I say the dinosaurs of southern Utah lived on beachfront property. This map approximates how the place looked back in the day. It brings perspective to how a giant tsunami roared northward when a space rock the size of Mount Everest hit the Yucatan peninsula. This is the same ocean elevation that covered the southern half on the southeastern states Randy.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,208
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Post by RWA3006 on Oct 31, 2022 20:01:34 GMT -5
RWA3006 Randy, this would be a rarity. Have you ever found a coprolite with a footprint looking feature on it? Rick, I haven't found any with clear distinct prints but I've found some that appear to have been trampled into nondescript fragments much like what you would see in stockyards full of cattle. I really need to program my eyes more towards spotting these because I get so focused in looking for perfect cutting specimens that I tend to tune out other relevant specimens.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,208
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Post by RWA3006 on Oct 31, 2022 20:07:23 GMT -5
People often have difficulty understanding why I say the dinosaurs of southern Utah lived on beachfront property. This map approximates how the place looked back in the day. It brings perspective to how a giant tsunami roared northward when a space rock the size of Mount Everest hit the Yucatan peninsula. This is the same ocean elevation that covered the southern half on the southeastern states Randy. Yes indeed Jim, I noticed that too and I have to wonder if there had been enough passage of time to cause a difference in the evolution of flora and fauna between Laramidia and Appalachia.
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RWA3006
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Member since March 2009
Posts: 4,208
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Post by RWA3006 on Nov 1, 2022 6:48:48 GMT -5
TURD TUESDAY
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Nov 1, 2022 7:11:32 GMT -5
This is the same ocean elevation that covered the southern half on the southeastern states Randy. Yes indeed Jim, I noticed that too and I have to wonder if there had been enough passage of time to cause a difference in the evolution of flora and fauna between Laramidia and Appalachia. Flora/fauna was likely as different then as it is today Randy. Just not near as much terrestrial dinosaur preservations. May have been due to the lack of tectonic activity, erosion types and volcanic ash who knows. webhome.auburn.edu/~kingdat/dinosaur_webpage.htmFound this: "The conventional geologic story renders the East Coast of North America as a so-called passive margin, an area free of volcanoes and earthquakes due to its position within the fractured plates that make up the surface of the globe."
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,208
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Post by RWA3006 on Nov 1, 2022 7:25:05 GMT -5
jamesp That's a good article, Jim. Thanks
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jamesp
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Member since October 2012
Posts: 36,158
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Post by jamesp on Nov 1, 2022 10:52:01 GMT -5
jamesp That's a good article, Jim. Thanks What stuns me is the finding of over 400 species of fossil palms alone washed down from the rockies and native to Texas. There is less than a dozen native species of palm in the US in recent centuries. The amount of variety in those forests were insane. Imagine the reptilian diversity ! If only we could be transported back to then in a reptilian-protected bubble. Last thing anyone would want to happen would be being attacked by some 3 foot tall T-Rex-like razor toothed lizard running around at 50 mph on 2 legs. Imagining dino scat with human teeth in it !
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Post by 1dave on Nov 1, 2022 23:22:01 GMT -5
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RWA3006
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Member since March 2009
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Post by RWA3006 on Nov 2, 2022 7:10:09 GMT -5
1dave I wish I could remember where I read a recent article talking about the excellent vision of the T-rex. It claimed their eyes were huge, along with the part of the brain associated with vision. It also said the T-rex had stereoscopic vision much like alpha predators of today. It's interesting to note that humans have great stereoscopic vision that's typical of predatory species.
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Brian
fully equipped rock polisher
Member since July 2020
Posts: 1,506
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Post by Brian on Nov 2, 2022 8:35:29 GMT -5
1dave and RWA3006 , I took these photos a few months ago in Morrison, Colorado. When viewing this T. Rex skull, I was struck by two things. First, I was amazed at how forward facing its eyes were. It often seems that depictions show T. Rex looking sideways (and the side view photo seems to support this), but this photo shows that was not the case. Second, the ring of bones in the eye socket (the sclerotic ring) is very similar to those found in birds of prey. While the bones may have provided support, they could have also provided T. Rex with very sharp vision. I can’t even imagine what it would have been to face one of these fellas in real life. I bet more than one coprolite was left behind from such a sight.
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RWA3006
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Member since March 2009
Posts: 4,208
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Post by RWA3006 on Nov 2, 2022 22:53:36 GMT -5
brian That's amazing, and I notice the olfactory structure has ample resources too. It would have been sporty to try to evade those critters.
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Brian
fully equipped rock polisher
Member since July 2020
Posts: 1,506
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Post by Brian on Nov 3, 2022 7:17:05 GMT -5
brian That's amazing, and I notice the olfactory structure has ample resources too. It would have been sporty to try to evade those critters. They must have been quite tough, too. This skull has several punctures completely through the bone where any T. Rex’s teeth broke through. Given its size, I wonder if it was more of an ambush-type predator. It seems unlikely that it would have been a stealthy stalker.
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RWA3006
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Member since March 2009
Posts: 4,208
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Post by RWA3006 on Nov 3, 2022 18:03:27 GMT -5
This is the largest coprolite I've ever lugged home. It was all I could do to lift it into the back of my truck and when I set it between my rose bushes it broke in half. A true tragedy.
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RWA3006
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Member since March 2009
Posts: 4,208
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Post by RWA3006 on Nov 3, 2022 18:05:22 GMT -5
This is the second largest I brought home.
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Post by HankRocks on Nov 3, 2022 18:15:11 GMT -5
This is the largest coprolite I've ever lugged home. It was all I could do to lift it into the back of my truck and when I set it between my rose bushes it broke in half. A true tragedy. If they were not too large for a 24 inch saw, I would cut the two faces flat and then try and polish them. I did that for a large(about 8") Thunderegg that had been badly cut. It would have taken too long on the Vib Lap to smooth the cut offset.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,208
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Post by RWA3006 on Nov 6, 2022 13:04:51 GMT -5
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,208
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Post by RWA3006 on Nov 8, 2022 8:13:04 GMT -5
TURD TUESDAY
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Post by rockjunquie on Nov 8, 2022 8:15:38 GMT -5
TURD TUESDAY LOL!!! I guess you could say she is sh*t faced.
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