When the Polish shale rocks were formed?
... The presence of fossils, including in particular the graptolites, an extremely fast evolving group of plankton organisms, enables ... rocks in terms of unconventional petroleum exploration. Graptolites are common in Ordovician and Silurian dark claystones and ...
Artykuł - 29/10/2014 - 13:22
 The beginning or shale oil
... reptiles or of the ammonites, belemnites, trilobites or graptolites, as exhibited in natural history museums, are not essential in ...
Artykuł - 23/09/2014 - 22:32
Shale gas - a brief history of prospecting in the world and Poland
... The most interesting fossils are those of extinct graptolites – small invertebrates resembling grass leaves with jagged edges ...
Artykuł - 29/12/2014 - 15:47