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[[preprinted]] 0017 [[/preprinted]]

Sept. 29, 30
Ike's Canyon

Sequence in brachiopod beds at top of canyon.

[image: Sketch of Biostratigraphic diagram of area during the Silurian era.]

        | Rhysostrophia (coarse ribs)
          Toquimia, Valcourea
Porambonites| Orthis (wide spaces between ribs fine-ribbed Rhyso
Snails Aporthophyla|
Thin-bedded platy |

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