Froze Toez Posted February 17, 2013 Share Posted February 17, 2013 I decided to check on one of my streams now that the water level is going down and the weather was warming up. I found a few new additions to our collection. Link to comment Share on other sites More sharing options...
Froze Toez Posted February 17, 2013 Author Share Posted February 17, 2013 This is what our local streams look like when they cut down through the soil and hit the marl layer. Link to comment Share on other sites More sharing options...
xonenine Posted February 17, 2013 Share Posted February 17, 2013 great finds, looks like a fun place to collect, we have a little longer to wait for the water level in creeks in Buffalo yet "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus Link to comment Share on other sites More sharing options...
MikeR Posted February 17, 2013 Share Posted February 17, 2013 Looks like Zone 2 Yorktown Formation "A problem solved is a problem caused"--Karl Pilkington "I was dead for millions of years before I was born and it never inconvenienced me a bit." -- Mark Twain Link to comment Share on other sites More sharing options...
cowsharks Posted February 17, 2013 Share Posted February 17, 2013 Any shark teeth in the creek? Link to comment Share on other sites More sharing options...
Froze Toez Posted February 19, 2013 Author Share Posted February 19, 2013 Yes it is the Yorktown Formation. And there are no signs of shark teeth or ray plates. I've only found shells there. I've been wondering why with all that food for bottom feeders there are no ray plates. Maybe one day... Link to comment Share on other sites More sharing options...
K-lover Posted February 19, 2013 Share Posted February 19, 2013 That really looks like a great area. Don't be shy about posting more pictures of fossil shells. It is not all about shark teeth. Link to comment Share on other sites More sharing options...
cowsharks Posted February 19, 2013 Share Posted February 19, 2013 Have you found any large Chesapecten or Ecphora shells? Link to comment Share on other sites More sharing options...
Joyce Posted February 22, 2013 Share Posted February 22, 2013 Would love to find whole Chesapectens! Gorgeous! Link to comment Share on other sites More sharing options...
MikeR Posted February 22, 2013 Share Posted February 22, 2013 Yes it is the Yorktown Formation. And there are no signs of shark teeth or ray plates. I've only found shells there. I've been wondering why with all that food for bottom feeders there are no ray plates. Maybe one day... Rock formations are based upon the lithology of the deposit whereas zones, units and members can be named due to fossil content. The Yorktown Formation is split between two fauna zones; a lower Early Pliocene zone and an upper Late Pliocene zone. An extinction event occurred in which once plentiful vertebrates in Zone 1 disappeared and become much less common in Zone 2, hence the lack of shark and whale remains in your Zone 2 stream. The Zone 1 environment was much like that of Northern California and Alaska while Zone 2 was similar to that of today's Carolinas. The prevailing theory is that the rise of the Isthmus of Panama cut off the upwelling of cold but nutrient rich deep water that predominates the Eastern Pacific today and forced warmer southern water northward. The result was fewer fish and therefore fewer large mammals. As megalodon possibly fed on whales it did not survive into Zone 2. Mike 1 "A problem solved is a problem caused"--Karl Pilkington "I was dead for millions of years before I was born and it never inconvenienced me a bit." -- Mark Twain Link to comment Share on other sites More sharing options...
masonboro37 Posted February 23, 2013 Share Posted February 23, 2013 Nice finds, that Olive Shell is so pretty. Thanks for sharing and get there again! Process of identification "mistakes create wisdom". Link to comment Share on other sites More sharing options...
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