HIGH-RESOLUTION CORRELATIONS BETWEEN GOTLAND AND ESTONIA NEAR THE BASE OF THE WENLOCK

被引：51

作者：

JEPPSSON, L

MANNIK, P

机构：

[1] Department of Historical Geology & Palaeontology, Lund, S-223 62

[2] Eesti Teaduste Akadeemia, Geoloogia Instituut, Tallinn

来源：

TERRA NOVA | 1993年 / 5卷 / 04期

关键词：

D O I：

10.1111/j.1365-3121.1993.tb00268.x

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The strata of the Ireviken Event can be correlated between Gotland, Sweden and the Viki core on Saaremaa, Estonia, with a high degree of precision. Most of the ten datum planes are found with a precision of better than 0.1 m in the Lower and upper Visby Beds on Gotland and high in the Mustjala Member of the Jaani Formation on Saaremaa. Five of the latest Llandovery-early Wenlock units defined by these datum planes are between c. 0.12 and 1.77 m thick on Gotland and 0.12 and 0.67 m in Estonia. The duration of each was between a few thousand and c. 31 000 years. The stratigraphic resolution achieved in the interval of the Ireviken Event is 10,000 years. Ultimate range ends are lacking within a preceding, slightly longer interval, but the pattern of intermittent presence of some taxa agrees well with an unchanged relative rate of sedimentation. Their coeval presence in different places indicates ecological, regional or more widespread changes.

引用

页码：348 / 358

页数：11

共 29 条

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