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Middle Ordovician

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Middle Ordovician [′mid·əl ‚ȯr·də′vish·ən]
(geology)
The geologic epoch occurring between the Upper and Lower Ordovician, beginning approximately 460,000,000 years ago.
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I]) stages of the Middle Ordovician in Baltoscandia and is also present in the Tourmakeady Limestone (Adrain & Fortey 1997).
Distribution of the order Proetida (Trilobita) in Baltoscandian ... by Parnaste, Helje; Popp, Adrian; Owens, Robert M. / Estonian Journal of Earth Sciences
Traditionally the Viru Series has been considered to be synonymous with Middle Ordovician [e.
Age of Estonian kukersite oil shale--middle or late Ordovician? by Hints, O.; Nolvak, J.; Viira, V. / Oil Shale
Middle Ordovician phosphatic inarticulate brachiopods from Vastergotland and Dalarna, Sweden.
A new type of shell structure in a phosphatic brachiopod from the ... by Nemliher, Juri / Proceedings of the Estonian Academy of Sciences: Geology
 
 
 
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