File talk:Raven Ridge, Colorado.jpg

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K-T boundary?

As another user noted here, this isn't a good example of the K-T boundary, because it's represented here by an unconformity, ie the actual boundary is missing.

Note that the current NASA graphic has dropped the KT line on the photo: [1]. I'll upload the new version shortly. Unhelpfully, NASA doesn't note the correction. --Pete Tillman (talk) 02:29, 22 December 2011 (UTC)[reply]

The dotted line on the Raven Ridge image is actually not far off the Wasatchian-Bridgerian boundary in the Eocene. There is an unconformity between underlying Mesa Verde Formation (Cretaceous) and the overlying Colton/Wasatch Formation (Early Eocene... Wasatchian), but it's further to the east and not visible in air photos. The Raven Ridge strata are of no significance at all with regards to the K-T boundary. The NASA photo has been updated, so hopefully this misinformation will stop proliferating. The Shoveller (talk) 04:38, 22 December 2011 (UTC)[reply]