TY - BOOK AU - Troeger, Jack Clayton, CN - QE111 .T76 1983 CN - QE111 CY - Ames, Iowa : DA - 1983. ET - 1st ed. ID - 89666 KW - Geology N1 - Includes index. PB - Iowa State University Press, PP - Ames, Iowa : PY - 1983. SN - 0813815215 T1 - From rift to drift :Iowa's story in stone / TI - From rift to drift :Iowa's story in stone / ER -