Now showing items 1-6 of 6
Age constraints on Precambrian glaciations and the subdivision of Neoproterozoic time
(Subcommission on Neoproterozoic Stratigraphy, 2005)
A review of age constraints on the Neoproterozoic glaciations suggests that at least four distinct glacial events can be recognised, three of which appear to be global. These are (in order from oldest to youngest) the ...
Cryptic disc structures resembling Ediacaran discoidal fossils from the lower Silurian Hellefjord Schist, Arctic Norway
(Public Library of Science, 2016)
The Hellefjord Schist, a volcaniclastic psammite-pelite formation in the Caledonides of Arctic Norway contains discoidal impressions and apparent tube casts that share morphological and taphonomic similarities to Neoproterozoic ...
Disc-shaped fossils resembling porpitids or eldonids from the early Cambrian (series 2: stage 4) of western USA
The morphology and affinities of newly discovered disc-shaped, soft-bodied fossils from the early Cambrian (Series 2: Stage 4, Dyeran) Carrara Formation are discussed. These specimens show some similarity to the Ordovician ...
Non-mineralised discoidal fossils from the Ordovician Bardahessiagh formation, Co. Tyrone, Ireland
(Royal Irish Academy, 2010)
Four non-mineralised fossils from the Ordovician Bardahessiagh Formation, near Pomeroy, Co. Tyrone, have been examined for the first time following their recovery from a temporary trench dug in 1992, and are here described ...