Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
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Transcription
Friday September 1, 1933
Wea.
THUR. OCT. 28, 1909
Ther.
Spent most of the morning writing up the observations of yesterday.
In the afternoon restudied the Highgate Gorge sequence and made striking corrections of my former interpretation. The sequence beneath the Highgate slates as follows:
The Highgate slate passes gradually into lams and some dolomitic lds. This series appears to be 25' thick. Basal part of Highgate slate.
The next older beds above Pown House on north shaley grit dip at about 70° S.E. or with dikes,
Below the Highgate thin redded ls series follows:
Knolly calcareous slate not conglomeratic 3'-4
Calcareous slate replite with intraformational
small angular ls pebbles, averaging 2"-3" and smaller.
At the base is a bed 0-6" of flue ls, and beneath it
a thin 0-10" thick of very small pebble ls conglomerate. These conglomerate beds are 5'-6' thick.
Thin redded flue ls 1'. Not seen on S side of plain.
Yellowish weathering tumbled massive clod. 1/fort.
On south side similar but to 2'
Thin red ded ls as before 1'