Palynostratigraphy and lithostratigraphy of Carboniferous Upper Codroy Group and Barachois Group, southwestern Newfoundland

Abstract

A new zone, the Reticulatisporites carnosus

Cyclic changes in Pennsylvanian paleoclimate and effects on floristic dynamics in tropical Pangaea

“…Potoniesporites, possible conifer pollen, is common in early Namurian fluvial deposits in Newfoundland (Utting and Giles, 2008) and late Namurian marine bands in the UK suggesting an early origin of conifers just before the Mississippian-Pennsylvanian boundary (Stephenson et al, 2008). Zhou (1994) identified conifer-like pollen grains at paleo-paratropical latitudes in present day China during the Early Pennsylvanian (early Bashkirian).…”

Fluvial response to paleo-equatorial climate fluctuations during the late Paleozoic ice age

“…Deposits of late Serpukhovian age from Newfoundland record a transition from semiarid to humid conditions inferred from the presence of coal measures that have been correlated with the upper portion of the Searston Formation (Knight, 1983;Utting and Giles, 2008). It Cl.…”

“…The region would have traversed the Southern Hemisphere subtropical zone to enter the equatorial humid zone in the late Serpukhovian, which is when the fi rst indications of humid conditions are recorded from coal deposits in the Bay St. George Basin of Newfoundland (Utting and Giles, 2008). Tectonic drift cannot, however, explain the increased aridity observed from the late Moscovian-early Kasimovian into the Early Permian because the region remained within fi ve degrees of the paleo-equator during this period and was within the limits of peak equatorial rainfall that has been established from modern climate patterns.…”

Palynostratigraphy of Mississippian and Pennsylvanian rocks, Joggins area, Nova Scotia and New Brunswick, Canada

“…These workers also pointed out that in the past, the presence of coal was often taken to be an indicator of a Pennsylvanian age in northeastern Kentucky, yet coal is known from the late Chesterian (early Serpukhovian). Similarly, coal occurs in southwestern Newfoundland in the upper part of the Searston Formation, Barachois Group, and is dated as late Pendleian to Arnsbergian (Utting and Giles 2008).…”