DVL Posted May 16, 2017 Share Posted May 16, 2017 Quick question for the experts: I've found a number of marine fossils in Newark Supergroup locations- corals, crinoids, brachiopods, yet I've read that the formation is non-marine. I'm told they could be glacial deposits. I also recall that Coelacanths have been found which I assume were marine. Was the formation marine or not? Or both? Thanks in advance! Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 16, 2017 Share Posted May 16, 2017 The Newark Supergroup was not made up of marine deposits. The prevailing theory is that it was a lacustrine environment, with some alluvial fan deposits, and possibly some estuarine deposits as well. So - freshwater lakes, some river entrances/exits, and some brackish water possibly. Regards, 4 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
doushantuo Posted May 16, 2017 Share Posted May 16, 2017 I'm just looking at some Olsen from Manspeizer et al. 1 Link to comment Share on other sites More sharing options...
doushantuo Posted May 16, 2017 Share Posted May 16, 2017 lacustr 2 Link to comment Share on other sites More sharing options...
DVL Posted May 16, 2017 Author Share Posted May 16, 2017 4 hours ago, Fossildude19 said: The Newark Supergroup was not made up of marine deposits. The prevailing theory is that it was a lacustrine environment, with some alluvial fan deposits, and possibly some estuarine deposits as well. So - freshwater lakes, some river entrances/exits, and some brackish water possibly. Regards, Thanks! Assume the stuff I'm finding is glacial then (or freshwater brachiopods maybe?). Link to comment Share on other sites More sharing options...
DVL Posted May 16, 2017 Author Share Posted May 16, 2017 3 hours ago, doushantuo said: lacustr Great info- Thank you Doushantou! Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 16, 2017 Share Posted May 16, 2017 9 minutes ago, DVL said: Thanks! Assume the stuff I'm finding is glacial then (or freshwater brachiopods maybe?). The only freshwater bivalves/shells known in the NSG are unionid clams, (Unio sp.) and darwinulid ostracods, (Darwinula sp. ) and the conchostrachans Cyzicus sp. and Estheria ovata. The larger clams, Unio sp. are very rare. Regards, 3 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
doushantuo Posted May 16, 2017 Share Posted May 16, 2017 back! Outtake: 1 Link to comment Share on other sites More sharing options...
doushantuo Posted May 16, 2017 Share Posted May 16, 2017 astrochronology(note:VERYGOOD) 1 Link to comment Share on other sites More sharing options...
doushantuo Posted May 16, 2017 Share Posted May 16, 2017 excellentstratigraphy 1 Link to comment Share on other sites More sharing options...
doushantuo Posted May 16, 2017 Share Posted May 16, 2017 very good bit on synrift sedimentation,almost a crash course in structural basin analysis 1 Link to comment Share on other sites More sharing options...
DVL Posted March 24, 2018 Author Share Posted March 24, 2018 Haven't been on here in a while- thank you for the above responses- very informative. Link to comment Share on other sites More sharing options...
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