North Sulfur river, Texas finds

[collector]

We are western New Yorkers but with family in Texas ~2 hours from the North Sulfur river we decided to go fossil hunting. We hired a guide for the first time and fit one more trip in before coming home. The guide was super nice and gave us a number of his finds and we ended up with mosasaur vertebrae, a camel toe bone, fossil wood, exogyra shells, etc. I have some questions. 

   In the 1st and 3rd pics, #1 is an unknown to me. The brown area is shiny like the enamel of 2,3,4. Our guide gave us 2&3 explaining that 2 is mammoth and 3 is mastodon. I found 4 and it is similar to 3. Are there a great differences in how bits of enamel look? Is mastodon enamel always thicker and is 2 a random shape or not.

   5,6,7, 10 are unknowns. Does someone know what type of bivalve 8 & 9 might be?

   In picture #4 do all of the pieces look like fossil wood? There is an end shot of the piece with the pink on top and I wondered if it could be palm wood and is it possible to know what other types of wood are found in this river?

  I am guessing that the teeth in the next pic are from cows not bison just because they look newer. Is that reasonable to assume and maybe not big enough?

in the 2nd pic, the largest bone is mosasaur. It has layers that I wondered about and is that a common presentation?  The smaller bones don’t look like the mosasaur bones we have. Can you say by looking at them that they are not?

Thank you for taking the time to look at all of these.

Patti

Edited April 26, 2023 by collector

[CDiggs]

I think you've got the ID's on #2 and #3 flipped, #2 does look like mastodon enamel and #3 is definitely mammoth tooth plate enamel.

[collector]

Thank you