Field Notebook: CO 1952b
Page 33
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Transcription
2. Clay bed in at 1 continues back down slope to here. Split below comes with it and probably two or more thin beds above it. No boulder-like clays observed 3 Clay bed in here, gradually thins to N and pinches out at (3A). From 3A N, locally lost - may cross at 4 or more likely is bed that comes in again at 7. Could be main bed, then those coming off rim at 1 would be three small beds above it. Also could be local, atypical lens in 1st Glencirun - like one in Alameda-Morrison hogback, then main bed would be in group that cross rim at 1. Clay pellet col at (loc?) 4. Maybe clay horizon (see 3) picks off rim. Just north is small fault crossing fracturing beds, about 3' downthrow to S. 5 Swale where 2nd shale locally comes onto rim. Porellenitic bed present at top, platy beneath, the shale. 6 Disconformity is ss on ss. 3rd's relatively thin, not more than 5', and platy, lies in slope, only locally ledgy. 4th Shale present, then basal Glen sand that is fine-mid grit sits on thick unit massive x-bed, eolith light grey hyle. section down from top of basal Glencirun 7.5. Sandstone, massive bed brown-wash, fine- med gr, cross lam. ss. Disconformity 59.0 Sandstone*, massive light gray, wash yellowish, fine to coarsely cross-bedded. base obscured by wash. Another ss bed about 8' thick, massive cross bedded, used to coarse comes in down wash covered clstn slope (that includes some red clstn) Guess that it is about 30'- below ss above, * Locally zone of red clstn comes in 6 to 10 ft from top [cont. p. 28] 14.