Download Ammonites and the Other Cephalopods of the Pierre Seaway: by Neil L. Larson, Steven D. Jorgensen, R. A. Farrar, Peter L. PDF

By Neil L. Larson, Steven D. Jorgensen, R. A. Farrar, Peter L. Larson

Show description

Read Online or Download Ammonites and the Other Cephalopods of the Pierre Seaway: Identification Guide (Fossils & Dinosaurs) PDF

Similar nonfiction_2 books

New Perspectives on Disaffection

Commonly, domestic situations or tuition regimes were blamed for the worst excesses of student disaffection. The authors argue that this simplistic reaction to a fancy challenge has to be re-examined. The e-book studies the findings of a study programme, established in Aberdeen, which explored the standards resulting in scholar disaffection.

Gruber's Essential Guide to Test Taking: Grades 6-9 - 2nd edition

Within the present No baby Left in the back of schooling atmosphere, attempt taking is extra vital than ever. A needs to for fogeys aiding their youngsters comprehend the $64000 pondering concepts in all test-taking parts, Gruber's crucial advisor to check Taking: Grades 6-9 is helping them discover their kid's precise strength.

Gehenna - Time of Judgement (Vampire: The Masquerade)

The tip of the realm. .. The prophecies of Gehenna have been real. the area teeters close to an undead apocalypse, the evening whilst the progenitors of the vampire race upward thrust to eat their childer amid a rain of blood and fireplace. because the fated Armageddon for the Kindred arises, what can they do? FOR THE DAMNED Drawing the Vampire Line to a detailed, GEHENNA brings in regards to the end of Vampire's global of Darkness.

Extra info for Ammonites and the Other Cephalopods of the Pierre Seaway: Identification Guide (Fossils & Dinosaurs)

Example text

About two per shell diameter low degree of taper Moderate Baculltes sp. (weak flank ribs) Rolm to ovate cross section Mlnor to well-ribbed venter Broad arcuate ribs or swellings on flanks, about one per sheU diameter Moderate 0 ' J Bacu/ites sp. (smooth species) Ovate cross sectJon Minor nobong on venter Smooth flanks Siogtll degree of taper Moderate 41 · ;r FAMILY COLLIGNONICERATIDAE W RIGtiT:,-·AND The Family Collignoniceratidae i s characterized b y compressed oval to nearly square whorled forms of planispiral ammonites with a generally evolute umbilicus.

Specimens are found Colorado, and New Mexico, Springs Member and lower part in the upper part of the Sharon in South Dakota, Wyoming, of the Mitten Member in Wyo­ as well as in the Claggeu ming, South Dakota, and Colo­ Shale in Montana. rado, and i n the Claggett Shale in Montana. >> seccion 22 Ammonites and tire other Ct'plralopods ofthe Pierrf' Seaway 35 cm long Baculites mrleami sumre pattern vl� Recside 1927 USGS 06372 Cobban 1962b cro>s section Baculites asperiformis Meek. 187 6 Baculites sp.

Gh to low degree of taper Moderate to large Baculites corrugatus Elias. 1933 Compressed CfOSS section Prorrunent ventral ribs,five to seven per shell diameter Smooth flanks Slight degree of taper Moderate to large 8 )) Bacu/ites rugosus Cobban, 1962a Compressed cross sec1ton Strong ventral bs, n three to four per shell diameter Smooth to weakly ribbed flanks Htgh to low degree of taper Moderate to large 39 15,,, L 1 ITr I r" N 1 1 t I< ,, l iON G UlllL 'J Typical suture pattern Bscu/ites crlckmayi Williams, 1930 Ovate cross secti0/1 Smooth to well-ribbed venter Sculpted flanks with broad undulations.

Download PDF sample

Rated 4.32 of 5 – based on 24 votes