BIOSTRATIGRAPHY OF THE UPPER BAJOCIAN-MIDDLE CALLOVIAN (MIDDLE JURASSIC), SOUTH-AMERICA

被引：10
|
作者：
RICCARDI, AC
WESTERMANN, GEG
ELMI, S
机构：
[1] CONICET, División Paleozoología Invertebrados, Museo de Ciencias Naturales, 1900 La Plata, Paseo del Bosque s/n
[2] McMaster University, Hamilton, Ont.
[3] Université Claude-Bernard
来源：
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES | 1991年 / 4卷 / 03期
关键词：
D O I：
10.1016/0895-9811(91)90027-I
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The biostratigraphic division of the upper Bajocian-middle Callovian of South America is based on ammonites from different sections of the following provinces and regions: Neuquen, Mendoza, and San Juan in Argentina; Malleco, Linares, Talca, Atacama, Antofagasta, and Tarapaca in Chile. The complete upper Bajocian-middle Callovian succession includes the following biostratigraphic units: the Megasphaeroceras magnum assemblage zone, lowermost upper Bajocian; the Cadomites-Tulitidae mixed assemblage, (?lower) middle and upper Bathonian; the Steinmanni zone, index Lilloettia steinmanni (Spath), uppermost Bathonian, with two local horizons-Stehnocephalites gerthi horizon (Argentina) and Choffatia jupiter horizon (northern Chile); the Vergarensis zone, index Eurycephalites vergarensis (Burck.), near the Bathonian-Callovian boundary; the Bodenbenderi zone, index Neuqueniceras (Frickites) bodenbenderi (Tornq.), lower Callovian; the Proximum zone, index Hecticoceras proximum Elmi, uppermost lower Callovian; and the Rehmannia (Loczyceras) patagoniensis horizon, middle Callovian.
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页码：149 / 157
页数：9
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