Image from the Biodiversity Heritage Library.
Contributed by Smithsonian Institution Archives.
| www.biodiversitylibrary.org
Transcription
Dr.15D
3
Aug 25 - 1904
From my feet horizontal distance east to the other side of bridge is a dyke crossing the Castalla gorge it is 3 thick and is typical upon one side I gaze in the other.
The sides of this page are marked by notches where I note then
Dyke A The material of this dyke is darker color than the average small dyke being very dark almost blackish with a little of the greenish tint from it cuts through almost at 90 deg in N & W and S & E direction (appears)
Dyke B Thirty feet west of A is the light colored remains of a 23" dyke exposing the zone paralleled to
Dyke A The clay is a reddish cast with numerous particles mica mixed with thin shale clay dyke is exposed on north side 79 gauge only being covered on S side.
Dr.15E About sixty feet east of bridge down Fall Creek gorge and about 100 yds above Tunnel and same distance below water works land is a small dyke. It overlooks the deep notch or south end gorge from which is an old fladder. The dyke doesn't extend gorge into the north cliff at least I can not be seen from S side Jetiam
Dyke A The dyke is 4" thick at lowest part of it here it will proceed but with a kind of a decided rusty slate cut where floor it is 50 thick
1st. (B)
1
Aug /28th Glen
The form Glenn as Mr. Penny there from point running along the middle of Glen and at Bar 440's is a small anticline with traces at this point flows. This joins in East 8 deg and 14 degs.
Below rough sketch:
[diagram]
Our hundred yards above the strata become horizontal and trace of anticline appears.
August 26 - 1904
Looked through Butternut Creek gorge and the first one north also the holes opposite side of L & Ky. but found no dykes.
August 27 - 1904
Looked Through Buttermilk Falls gorge and got around south and through Williams Brook gage at S & E corner Lake Cowana and found up dykes by Mr. Indian Creek gorge The following described dyke seems
Dr.3B In Indian Creek gorge at 735' elevation a 2" dyke across the stream almost at 90 deg apparently on N side. The dyke when found appeared as a 2 order fault filled with sand and gravel to waste dipping