Marine oxygenation, lithistid sponges, and the early history of Paleozoic skeletal reefs

JH Lee, R Riding - Earth-Science Reviews, 2018 - Elsevier
Microbial carbonates were major components of early Paleozoic reefs until coral-
stromatoporoid-bryozoan reefs appeared in the mid-Ordovician. Microbial reefs were …

The Sirius Passet Lagerstätte of North Greenland: a remote window on the Cambrian explosion

DAT Harper, EU Hammarlund, TP Topper… - Journal of the …, 2019 - lyellcollection.org
The lower Cambrian Lagerstätte of Sirius Passet, Peary Land, North Greenland, is one of the
oldest of the Phanerozoic exceptionally preserved biotas. The Lagerstätte evidences the …

The Mo-and U-isotope signatures in alternating shales and carbonate beds of rhythmites: A comparison and implications for redox conditions across the Cambrian …

J Li, K Azmy, B Kendall - Chemical Geology, 2022 - Elsevier
Abstract The Green Point Formation (GPF) of the Cow Head Group in western
Newfoundland (Canada) includes the Global Boundary Stratotype Section and Point (GSSP) …

Expanded marine anoxia at the Cambrian-Ordovician transition: Evidence from lime mudstone I/Ca and δ238U signatures of the GSSP in western Newfoundland …

J Li, K Azmy - Marine and Petroleum Geology, 2023 - Elsevier
The early Paleozoic witnessed two spectacular radiations of marine organisms—the
Cambrian (Є) Explosion and the Great Ordovician (O) Biodiversification Event. However, the …

[HTML][HTML] Keratolite–stromatolite consortia mimic domical and branched columnar stromatolites

JH Lee, R Riding - Palaeogeography, Palaeoclimatology, Palaeoecology, 2021 - Elsevier
The term keratolite is proposed for keratosan sponge carbonate dominated by vermiform
fabric that preserves the outlines of the original spongin skeleton. Thinly (<~ 2 cm) …

The Utica Shale and gas play in southern Quebec: geological and hydrogeological syntheses and methodological approaches to groundwater risk evaluation

D Lavoie, C Rivard, R Lefebvre, S Séjourné… - International Journal of …, 2014 - Elsevier
The risk of groundwater contamination from shale gas exploration and development is a
major societal concern, especially in populated areas where groundwater is an essential …

The reengineering of reef habitats during the Great Ordovician Biodiversification Event

B KRöGER, A Desrochers, A Ernst - Palaios, 2017 - pubs.geoscienceworld.org
Bryozoans, stromatoporoid sponges, and tabulate corals, all colonial metazoans with
lamellar, encrusting growth forms, developed and simultaneously diversified during the …

Redox conditions across the Cambrian–Ordovician boundary: Elemental and isotopic signatures retained in the GSSP carbonates

K Azmy, B Kendall, U Brand, S Stouge… - Palaeogeography …, 2015 - Elsevier
Lime mudstone samples (rhythmites) were collected at high resolution from outcrops of the
Cambrian–Ordovician GSSP boundary section at Green Point (western Newfoundland …

Late Cambrian climate change recorded by a shift from an arid carbonate platform to a storm‐dominated cool‐water platform at the Gondwana margin (Alborz Zone …

M Daraei, A Bayet‐Goll, G Geyer… - Geological …, 2023 - Wiley Online Library
The Deh‐Molla Formation of the Alborz Zone in northern Iran is a key unit to understanding
global sea‐level fluctuations, and likely climate changes during the Furongian Epoch. The …

High-resolution chemostratigraphy of the Cambrian–Ordovician GSSP: enhanced global correlation tool

K Azmy, S Stouge, U Brand, G Bagnoli… - Palaeogeography …, 2014 - Elsevier
Abstract The Green Point Formation of the Cow Head Group in western Newfoundland
(Canada) represents the Global Stratotype Section and Point (GSSP) for the Cambrian …