Field Notebook: Maryland, Washington, DC 1921
Page 33
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
Sep. 30 - 1900 Dr Muller's quarry there is a faced Tentaclitic limestone of about 75 feet. Near the top occurs Tentaculites gygeanthus and Byrichia. These beds are formed in cement. Below the cement a Tentaculite li. is shown at least 30 feet if thinner beds suppresed the 'Batulina'. Over a little valley more Batulina is shown. The dip here about 35°. The distance is about 258.3 ft = 150 yards. You fully three hundred gards farther to the red Pelina. = 737 ft. From Muller's quarry (top) to top of here there is at least 300 feet where the Orsley Black li. has a chert. The dip here is fast, about 35° and the here exceeds also about 487 ft = The Trihamsian come in about 30 feet below the top of the 'Batulina' here. Tentaculites Byrichia li. m. dubia gne. Orsley chert.