Upper Jurassic to Lower Cretaceous
Dasycladales of the Northern Calcareous Alps: the state of knowledge
Distribution of Dasycladales in the
Northern Calcareous Alps
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The Dasycladales species known from literature
reveal particular spatial and chronostratigraphic distributions. Among the 27 known
species, 20 occur in more than one locality. The five most frequent species occur in both
of the tectonic units: E. jurassica (6 localities), S. annulata (10 localities), S.
pygmaea (12 localities), A. podolica (6 localities), C. jurassica (11 localities). The
less frequent species known from more than one locality are restricted to one tectonic
unit: Tyrolic: N. socialis (3 localities), S. johnsoni (2 localities), P. bursiformis (4
loc.). Juvavic: M. praturloni (2 localities), S. sellii (4 localities), Z. embergeri (2
localities), C. catinula (2 localities), C. ? solkani (3 localities), A. elongata (2
localities).
Gallery - click images to enlarge
(will open in the same window)
Clypeina ? solkani,
various sections,
Locality: Plassen,
Plassen Formation |
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Campbelliella striata,
oblique section showing typical striation,
Locality: Plassen,
Plassen Formation |
 |
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Clypeina ? solkani,
various sections,
Locality: Plassen,
Plassen Formation |
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Campbelliella striata,
longitudinal section,
Locality: Plassen,
Plassen Formation |
Clypeina sulcata,
longitudinal section,
Locality: Plassen,
Plassen Formation |
 |
Campbelliella striata,
oblique section,
Locality: Plassen,
Plassen Formation |
 |
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Clypeina sulcata,
oblique section,
& Mohlerina basiliensis,
Locality: Barmstein,
Barmstein Limestone |
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Salpingoporella
gr. pygmea,
Locality: Krahstein,
Plassen Formation |
Clypeina sulcata,
cross section,
& Campbelliella striata,
Locality: Plassen,
Plassen Formation, |
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Salpingoporella
gr. pygmea,
Locality: Krahstein,
Plassen Formation |
 |
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Neoteutloporella
socialis,
oblique cross sections,
Locality: Trattberg,
Barmstein Limestone |
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Petrascula bursiformis,
Locality: Rötelstein,
Plassen Formation |
Neoteutloporella
socialis,
longitudinal sections,
Locality: Trattberg,
Barmstein Limestone |
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Pseudoepimastopora
jurassica,
Locality: Plassen,
Plassen Formation |
 |
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Salpingoporella
annulata,
longitudinal section,
Locality: Plassen,
Plassen Formation |
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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 (with algal
images)
6. Restrictions and Problems
7. Perspectives for Further Studies and Literature Cited
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