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| | Online guide to the continental Cretaceous-Tertiary boundary in the Raton basin (Site not responding. Last check: 2007-11-03) |
 | | Leaving the Trinidad area, go south over Raton Pass on I-25, through rocks of the Trinidad Sandstone (delta-front and barrier-bar environments) and Vermejo and Raton Formations (deltaic fluvial environments), to the contact of the Raton and Poison Canyon Formations (fluvial environments), which is near the top of the pass. |
 | | The route passes gently dipping alluvial floodplain sequences of sandstone, mudstone, shale, and coal beds of the Vermejo and Raton Formations and, about six miles south of Trinidad, the Morley dome becomes evident, marked by subtle changes in dip that bring the Trinidad Sandstone and Pierre Shale to the surface. |
 | | The lower coal zone of the Raton and the Vermejo Formation are present in roadcuts near the mouth of the valley. |
| esp.cr.usgs.gov /info/kt/sites_sr.html (1160 words) |
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