Lake Superior, Michigan, USA
Subject
Subject Source: Library of Congress Subject Headings
Scope Note: Created For = Charles Lyell Project 2020
Found in 2 Collections and/or Records:
Correspondence: John Phillips to Frederick William Rudler, 1845-1901
Sub-Series
Identifier: Coll-74/12/18
Scope and Contents
The Correspondence: John Phillips to Frederick William Rudler sub-series consists of:
- 40 letters, alphabetically arranged (1845-1901)
Dates:
1845-1901
Letter to Sir Archibald Geikie from Capt Clarence Edward Dutton, 05 May 1883
Item
Identifier: Coll-74/11/5/14
Scope and Contents
Letter to Sir Archibald Geikie from Capt Clarence Edward Dutton discussing the fossiliferous Upper Cambrian metamorphosed sandstone shales found at Lake Superior and the Grand Canyon. At Lake Superior these beds overlie 1400 feet of unfossiliferous sandstone and shale, interspersed with layers of copper bearing metamorphosed volcanic ash. These are the same as the Huronian metamorphic beds at Lake Huron which are possibly of the Lower Cambrian age due to an unconformity (as identified by...
Dates:
05 May 1883