Phosphorite and other apatite-bearing sedimentary rocks in the Precambrian of northern Michigan Cannon, William F. creator author. Klasner, J. S. author. Geological Survey (U.S.) issuing body. text bibliography vau 1976 monographic eng remote 1 online resource (iii, 6 pages) : maps. by W. F. Cannon and J. S. Klasner. Title from title screen (viewed July 1,2015). "Report prepared in cooperation with Geological Survey Division, Michigan Department of Natural Resources." Includes bibliographical references (page 6). n-us-mi Apatite Michigan Upper Peninsula Geology Michigan Upper Peninsula Geology, Stratigraphic Precambrian Phosphate rock Michigan Upper Peninsula Apatite Geology Geology, Stratigraphic Phosphate rock Precambrian Geologic Period Michigan Upper Peninsula From 570 million to 5 billion years ago fast I 19.4/2:746 I 19.4/2:746 Phosphorite and other apatite-bearing sedimentary rocks in the Precambrian of northern Michigan Cannon, William F. (DLC) 76608353 (OCoLC)2615637 Geological Survey circular ; 746 https://purl.fdlp.gov/GPO/gpo114479 COP 160707 20190718162054.0 in00004001658 eng