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This is an online version of a poster presented at the algal meeting in Cluj:
Fenninger, A. & Rasser, M., 2001. Upper Jurassic to Lower Cretaceous Dasycladaleans of the Northern Calcareous Alps (Austria) - the State of Knowledge. - Abstracts 4th Regional Symposium of the International Algae Association, Cluj-Napoca: 24.

 

Upper Jurassic to Lower Cretaceous Dasycladales of the Northern Calcareous Alps: the state of knowledge

Online version by Michael Rasser

 

Introduction

Upper Jurassic to Lower Cretaceous carbonate platforms represent unique environments. They are mostly isolated platforms within an oceanic environment, which replaced pelagic conditions prevailing during most of the Jurassic period. Their appearance was enabled by tectonically induced sliding masses in Oxfordian time, which caused a distinct facies differentiation from deep water limestones via red deep-swell limestones to shallow water carbonate platforms. This development, as well as their continuous succession until the Lower Cretaceous, represent remarkable differences compared to epicontinental settings.

Although Jurassic/Cretaceous Dasycladales are generally well studied and important carbonate constituents, the knowledge of this group from the Northern Calcareous Alps suffers from the scarcity of modern taxonomic, paleoecologic and paleobio-geographic studies. We therefore present the current knowledge (literature data) of Upper Jurassic to Lower Cretaceous Dasycladales of the Northern Calcareous Alps, which are currently studied within a new project of the Austrian Science Foundation (FWF). Only those localities are presented, from which detailed studies and/or lists of Dasycladales exist.

 

 

Contents:

1. Start - Introduction

2. Localities and Geology

3. Lithostratigraphy and Facies

4. Relevance of Dasycladales Algae

5. Distribution of Dasycladales in the Northern Calcareous Alps (withe algal images)

6. Restrictions and Problems

7. Perspectives for Further Studies and Literature Cited

 

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