In helically coiled, anisostrophic gastropods, paired muscle attachment scars are reported in adult shells in several Palaeozoic
platyceratoideans and rarely in pleurotomarioideans, but at the present day they are also present in some extant vetigastropods, neritomorphans, patellogastropods and a few caengastropods (Fretter & Graham 1994; Ponder & Lindberg 1997).
The acquisition of the new seismic coupled with the Basin Modelling has enabled the company to increase its understanding of the TAGI structural play, the deeper Palaeozoic
potential and the hydrocarbon charge model.
The northern onshore parts of the WD, so far a mainly gas-prone province, are under-lain by two east-west trending sub-basins containing thick Palaeozoic
to Tertiary sediments.
It has long been believed that ancient forests did not respond to climate changes in a significant manner, but a new study published in Nature Geoscience focusing on the Palaeozoic
Era reveals that such forests and climate were closely interconnected.
Silurian sedimentary rocks are distributed in most of the territory of Lithuania, except the southernmost part of the country that resulted from the Late Palaeozoic
Rocks consist of Palaeozoic
dolomite/limestone detachment blocks surrounded and underlain by Tertiary rhyolite tuffs.
In sections on Precambrian, Palaeozoic
, Mesozoic, and Cenozoic, the topics include the great oxygenation, ancient scorpions, halfway to mammals, sexual selection, grassed up, stuck in time, left-handed snails, and Sirenian slaughter.
Marker Assemblage zones of spores and pollen species through Gondwana Palaeozoic
and Mesozoic sequence in India.
Delgado (1886) distinguished almost twenty ichnospecies of Cruziana from the Lower Palaeozoic
of Portugal, yet Seilacher (1970) retained only C.
Due to the fragmentary nature of the new material and paucity of knowledge of Palaeozoic
scorpions the material is unidentifiable beyond Scorpiones incertae sedis.
The Acanthodii group of fish are also known as 'spiny sharks' owing to their appearance and, from what we know to date, they only lived during the Palaeozoic
Era and reached their maximum level of diversity in the Devonic period.