CENOZOIC GRAVELS ON THE RIM
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- journal_title：Geological Society of America Bulletin
- Contributor：WILLIAM E PRICE ; JR.
- Publisher：Geological Society of America
- Date：1950-
- Format：text/html
- Language：en
- Identifier：10.1130/0016-7606(1950)61[501:CGOTRO]2.0.CO;2
- journal_abbrev：Geological Society of America Bulletin
- issn：0016-7606
- volume：61
- issue：5
- firstpage：501
摘要
Cenozoic gravels along the rim of Sycamore Canyon are of two types: one containing rounded pebbles derived locally from the Shinarump conglomerate and developed in Pleistocene-Recent time; the other, angular pebbles derived from rocks similar to those exposed today in the Black Hills-Bradshaw Mountains area to the southwest and developed in the Miocene or Pliocene. The angular gravels were laid down, not upon a peneplain as suggested by Robinson, D. W. Johnson, et al., but upon a pediment that extended northeastward from the mountains and covered that area of the Colorado plateau now occupied by Sycamore Canyon.