Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
July 6
19
Of this promontory in Lead Ore, at the south east angle of this ore is a vertical fault bearing S. 30° E. which lets down the Brandon against
the Chazy. The lower 100 feet of the Brandon exposed is a dark
brown dolomite, much crushed and broken and dips steeply to
the south. These layers have an abundance of marine fossils. Above
are strata of clay sandstone, thin reddish of a light olive color. There
is also in some beds a fine crystalline crylomite. Sorry mistake.
The dip of these beds are clayey and become almost horizontal. Near
the south east corner of this ore which is about 200 yards wide
the beds are again sharply bent up on arc, exposing the fossiliferous
layers of the Brandon which now against the Chazy. The fault
plane dipping 30° due east. To the north the Chazy dips 180 ft.
20 ft.
Lead Ore
Fault
Chazy
Brandon
Lanil.
2 faults
greaves
“A lead prospect has been tunneled into the crushed
part of the Brandon dolomite near the northeast. Inside now
and a general denunciation of pyrite and lead are to be seen.”
Now go to page 22.