Field Notebook: Wyoming
Page 100
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
Our camp is pitched at the head of Plum Laps Creek near the farm of Mr Rudgley. On the hill S.E. of his farm are openings in a granite hill where I collected graphite, iron and granite. The graphite with the iron is interbedded with the granite. This granite is also cut by pegmatite. Also collected north of Mr Rudgley house about half mile. Here we secured a granular white marble. to the east It stands on edge against a quartzite with othe lier pure marble followed by great mass of granite. The marble has streaks of Egons. To the west of the marble occurs an amphibolite schist. Sathor also occurs here. The age of the marble is not yet unknown but the occurrence of the rock when compared with this area leads Prof Knight to believe it to be Carboniferous. The granite may be a Cact. eruption. This may also explain the occurrence of graphite in granite. Collected a number of flowers here.