Northern Sharks Posted August 11, 2011 Share Posted August 11, 2011 Can someone please tell me which formation would be at the bottom of the Roanoke River in NC -Yorktown, Eastover, other????? I recently bought a meg tooth, or possibly a late chubutensis, from a diver and would like to label it properly. Thanks in advance There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
Major Posted August 11, 2011 Share Posted August 11, 2011 Looks like it's mostly Yorktown, though it includes Cape Fear and Riverbend. Although I don't live in NC, I'd bet that it's Yorktown. Source: http://gis.enr.state.nc.us/sid/bin/iisid.dll?Extract&client=zGeologic_Mapsℑ=General_Geologic.sid&x=1698&y=0&level=1&width=3396&height=2154 ~Major Link to comment Share on other sites More sharing options...
Northern Sharks Posted August 12, 2011 Author Share Posted August 12, 2011 Thanks. That's the map I was looking for. There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
MikeR Posted August 12, 2011 Share Posted August 12, 2011 (edited) Vertebrate remains from the Roanoke for the most part come from a narrow band at the base of the Rushmere Member of the Yorktown Formation which sits directly on top of Cretaceous sediments (Black Creek Fm.?). This layer is a lag deposit representing everything between the Rushmere and the Cretaceous that was eroded and then redeposited in the Pliocene. The Rushmere itself is vertebrate poor, although I did see a section of whale jaw removed from the Rushmere on the Roanoke a couple of weeks ago. Knowing the geology of the area, the tooth probably originated in Zone 1 Sunken Meadow Member of the Yorktown Formation (Lower Pliocene) or the Eastover Formation (Upper Pliocene). Teeth that I have collected in-situ from the Roanoke I labeled "Mio-Pliocene Lag Deposit from the base of the Rushmere Member, Yorktown Formation". Edited August 12, 2011 by MikeR "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...
Sharkbyte Posted August 12, 2011 Share Posted August 12, 2011 Hello Major, Thanks for posting that link. I can make good use of that. Bobby Looks like it's mostly Yorktown, though it includes Cape Fear and Riverbend. Although I don't live in NC, I'd bet that it's Yorktown. Source: http://gis.enr.state...396&height=2154 ~Major "A journey of a thousand miles begins with a single step." - Confucius Link to comment Share on other sites More sharing options...
Sharkbyte Posted August 12, 2011 Share Posted August 12, 2011 Ask and you shall receive. You can't get more descriptive than that. Excellent reply. Vertebrate remains from the Roanoke for the most part come from a narrow band at the base of the Rushmere Member of the Yorktown Formation which sits directly on top of Cretaceous sediments (Black Creek Fm.?). This layer is a lag deposit representing everything between the Rushmere and the Cretaceous that was eroded and then redeposited in the Pliocene. The Rushmere itself is vertebrate poor, although I did see a section of whale jaw removed from the Rushmere on the Roanoke a couple of weeks ago. Knowing the geology of the area, the tooth probably originated in Zone 1 Sunken Meadow Member of the Yorktown Formation (Lower Pliocene) or the Eastover Formation (Upper Pliocene). Teeth that I have collected in-situ from the Roanoke I labeled "Mio-Pliocene Lag Deposit from the base of the Rushmere Member, Yorktown Formation". "A journey of a thousand miles begins with a single step." - Confucius Link to comment Share on other sites More sharing options...
MikeR Posted August 12, 2011 Share Posted August 12, 2011 Thanks. If you haven't seen it yet, I have more on the Roanoke in my blog http://www.thefossilforum.com/index.php/blog/101/entry-157-yorktown-formation-zone-2-rushmere-member/ "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...
Paleoc Posted August 12, 2011 Share Posted August 12, 2011 Vertebrate remains from the Roanoke for the most part come from a narrow band at the base of the Rushmere Member of the Yorktown Formation which sits directly on top of Cretaceous sediments (Black Creek Fm.?). This layer is a lag deposit representing everything between the Rushmere and the Cretaceous that was eroded and then redeposited in the Pliocene. The Rushmere itself is vertebrate poor, although I did see a section of whale jaw removed from the Rushmere on the Roanoke a couple of weeks ago. Knowing the geology of the area, the tooth probably originated in Zone 1 Sunken Meadow Member of the Yorktown Formation (Lower Pliocene) or the Eastover Formation (Upper Pliocene). Teeth that I have collected in-situ from the Roanoke I labeled "Mio-Pliocene Lag Deposit from the base of the Rushmere Member, Yorktown Formation". Eastover formation is late Miocene Link to comment Share on other sites More sharing options...
MikeR Posted August 18, 2011 Share Posted August 18, 2011 Eastover formation is late Miocene You are correct. That was a typo on my part and a failure to proof read.--Mike "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...
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