This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. Excerpt: ...fine-to medium-grained, lower part ledge forming, upper part soft; contains Ophiomorpha--80 50. Shale, siltstone and sandstone, dark-gray to dull-olive, soft; sandstone and siltstone laminae are cemented with limonite; poorly exposed on line of section but well exposed a quarter of a mile to south 115 USGS D5000, from limonite concretions 20 ft above base: Yoldial cvansi (Meek and Hayden) Nucula sp. Inoceramus aff. /. turgidus Anderson Pteria linquaeformis (Evans and Shumard) Oxytoma sp. Ostrea sp. Ooniomya americana Meek and Hayden Lucina sp. Tenea sp. Tellina munda Stephenson Corbula sp. Baculites sp. Didymoceras ef. D. nebrascense (Meek and Hayden) Principal reference section of the Allen Ridge Formation--Continued Allen Ridge Formation--Continued Unnamed marine member--Continued 50. Shale, siltstone and sandstone--Continued USGS D5001, from 70 ft above base: Serpula sp. Dysnoetoporoid bryozoan Inoceramus cf. /. pertenuis Meek and Hayden Oxytoma sp. Ostrea sp. Syncyclonema sp. Pholadomya sp. Protocardial sp. Cymella montanensis (Henderson) Tellina munda Stephenson Coroula sp. Acmaeal parva (Meek and Hayden) Acmaeal cf. A. occidentalis (Meek and Hayden) Cerithioderma'! sp. Tuba n. sp. Aporrhais aff. A. biangulata (Meek and Hayden) Euspira obliquata (Hall and Meek) Oyrodes sp. Morea sp. (only apex preserved but it belongs in the concellaria rather than marylandica species group) Belli fusus sp. (immature) Oraphidula cf. G. alleni (White) Acteon sp. Oligoptycha sp. Baculites sp. Didymoceras nebrascense (Meek and Hayden) Placenticeras intercalare Meek Fish scales Total unnamed marine member.-195 Lower part: 49. Sandstone, pale-yellowish-gray, fine-grained, hard; weathers dark reddish brown; con-tains a few limonite nodules in lower part and masses of concretionar...
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