Dr Sulphide Posted September 29, 2014 Share Posted September 29, 2014 Ok so there was another Q about the KT boundary but there was nothing about Oregon in it. I was just going to chime in about Oregon but its already been pulled off the op's first question. Additionally instead of sounding like a helpless dork (not insinuating that other op is at all) I decided to use my use what information I could find to discover the possibility of a kt exposure here in Oregon. So, for you that know or could give a reasonably educated guess, do you think theres kt exposure in the SW corner of the state? I thank you so much in advance. Link to comment Share on other sites More sharing options...
tmaier Posted September 29, 2014 Share Posted September 29, 2014 There seems to be very little exposure of the K-T in Oregon. Here is a map of the state, and it seems the only thing that might show promise is a tiny dot in the middle of the state. http://www.paleoportal.org/index.php?globalnav=time_space§ionnav=state&name=Oregon Link to comment Share on other sites More sharing options...
jpc Posted September 29, 2014 Share Posted September 29, 2014 (edited) Is there even any Paleocene in Oregon? And is the Cretaceous latest Cret? Edited September 29, 2014 by jpc Link to comment Share on other sites More sharing options...
tmaier Posted September 29, 2014 Share Posted September 29, 2014 The Paleoportal maps don't have that fine of time resolution, but normally you can find big, high resolution 6 foot maps of geological bedrock ages. Link to comment Share on other sites More sharing options...
Opisthotriton Posted September 30, 2014 Share Posted September 30, 2014 Download the Google Earth geologic map file for Oregon here: http://mrdata.usgs.gov/geology/state/ Look for a place where a Late Cretaceous Formation and a Paleocene formation touch. The exact K-T boundary may not be preserved, but you'd at least be close. 1 Link to comment Share on other sites More sharing options...
tmaier Posted September 30, 2014 Share Posted September 30, 2014 Oh cool... I didn't know those hi-res maps were on line. Thanks. Link to comment Share on other sites More sharing options...
Dr Sulphide Posted October 1, 2014 Author Share Posted October 1, 2014 Thank you so much everyone for your input. Link to comment Share on other sites More sharing options...
FossilDAWG Posted October 3, 2014 Share Posted October 3, 2014 I'm not aware of any Maestrichtian (latest Cretaceous) strata in Oregon. I'm pretty certain any K-T "boundaries in Oregon would be unconformable, with several tens of million of years missing including the actual boundary. For that matter, I'm not aware of the actual boundary (including an iridium-enriched layer) being exposed anywhere on the West Coast (i.e. California through to Alaska). Don Link to comment Share on other sites More sharing options...
piranha Posted October 3, 2014 Share Posted October 3, 2014 On 9/29/2014 at 10:22 AM, jpc said: ...Is there even any Paleocene in Oregon?... There are a handful of Paleocene floras (including inverts) in Oregon: Curry, Douglas, Morrow, & Umatilla counties. On 10/3/2014 at 9:49 AM, FossilDAWG said: ...I'm not aware of any Maestrichtian (latest Cretaceous) strata in Oregon... The K-Pg boundary is absent in Oregon but the Hornbrook and Hunters Cove formations do extend into the Maastrichtian. Orr, E.L., & Orr, W.N. (2009) Oregon Fossils (2nd Ed.) Oregon State University Press, 300 pp. Link to comment Share on other sites More sharing options...
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