Field Notebook: Maryland, Washington, DC 1921
Page 67
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
Wheelocks quarry section. Jerusalem Hill, off Wheelocks farm. Heavy bedded crystalline li. About 12 ft. Creymans [break?] 2 Gray dolomite bed of Days Corners. 4' 3 Thin bedded flaggy li. 3' 4 Cryst.li with Lepeditias 6" 5 Blue brittle li. 1 4" 6 Cryst. li with Lepeditias 8k 72" 7 Thin to heavy bedde 3' 8 blue brittle li. { Mancieenies bed. 6" } 9 6' For beds below this down to Water-line see page Ref. 14th. According to my estimates the Creymans in Litchfield Township is not less than 187 feet thick. It maybe 202 feet if the top-most 15 feet under the Onmdoja are added. Since my estimates are nearly always under the mark it is probable that the thickness