 The fragments are of different sizes. Some have a diameter of nearly a millimeter, and these are mingled with others of about one-fifth that diameter. Most appear elliptical in section. Some of the large fragments have a nucleus with a structure like...  Annual Report for ... with Accompanying Papers - Seite 219von Iowa Geological Survey - 1901Vollansicht - Über dieses Buch
 | Iowa Geological Survey - 1901 - 598 Seiten
...exposures show a succession of beds nearly twenty feet in thickness. GENERAL SECTION IN SECTIONS 27 AND 34, CRESCENT TOWNSHIP. FEET. 5. Yellowish and...lens, to be fragmental, consisting largely of small fusulinas, some of which were surrounded by a thin calcareous crust. These, together with finer fragmental... | |
 | 1901 - 582 Seiten
...Most appear elliptical in section. Some of the large fragments have a nucleus with a structure like H fragment of Stictopora. A few still larger fragments...lens, to be fragmental, consisting largely of small fusulinas, some of which were surrounded by a thin calcareous crust. These, together with finer fragmental... | |
| |
