Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
When this point is projected
west down dip to
point across small
valley just N of
400' point of offset
line x different lith
is encountered
fault ?
Therefore
new
source
point
taken from
400' y rest
on of section plotted
Section B from 400
starts at 400' pt, N