Fossilisation processes and our reading of animal antiquity
Estimates for animal antiquity exhibit a significant disconnect between those from molecular
clocks, which indicate crown animals evolved∼ 800 million years ago (Ma), and those from …
clocks, which indicate crown animals evolved∼ 800 million years ago (Ma), and those from …
Basin-scale reconstruction of euxinia and Late Devonian mass extinctions
Abstract The Devonian–Carboniferous transition marks a fundamental shift in the surface
environment primarily related to changes in ocean–atmosphere oxidation states,, resulting …
environment primarily related to changes in ocean–atmosphere oxidation states,, resulting …
[HTML][HTML] A global reassessment of the controls on iron speciation in modern sediments and sedimentary rocks: A dominant role for diagenesis
The speciation of iron in sediments and sedimentary rocks is a widely used proxy for the
chemistry and oxidation state of ancient water bodies. Specifically, the fraction of reactive …
chemistry and oxidation state of ancient water bodies. Specifically, the fraction of reactive …
A long-term record of early to mid-Paleozoic marine redox change
EA Sperling, MJ Melchin, T Fraser, RG Stockey… - Science …, 2021 - science.org
The extent to which Paleozoic oceans differed from Neoproterozoic oceans and the causal
relationship between biological evolution and changing environmental conditions are …
relationship between biological evolution and changing environmental conditions are …
Geochemical and hydrographic evolution of the Late Devonian Appalachian Seaway: linking sedimentation, redox, and salinity across time and space
Continental interiors were flooded by epeiric seas during many intervals of the geologic
past. Few modern analogs exist for these environments, however, and basic variables such …
past. Few modern analogs exist for these environments, however, and basic variables such …
[图书][B] The iron speciation paleoredox proxy
SW Poulton - 2021 - cambridge.org
In one form or another, iron speciation has had a long history as a paleoredox proxy. The
technique has been refined considerably over the years, and the most recent scheme is …
technique has been refined considerably over the years, and the most recent scheme is …
Reconstructing the paleoenvironment of an oxygenated Mesoproterozoic shoreline and its record of life
Abstract The Nonesuch Formation microbiota provide a window into ca. 1075 Ma life within
the interior of ancient North America. The Nonesuch water body formed following the …
the interior of ancient North America. The Nonesuch water body formed following the …
Oolitic ironstones, continental iron flux and reverse weathering in the Proterozoic Eon: Insights from the Tonian Katherine Group, Yukon
Oolitic ironstones are iron-rich and chert-poor sedimentary rocks containing concentrically
coated grains composed of iron (oxyhydr) oxides and iron phyllosilicates that offer a unique …
coated grains composed of iron (oxyhydr) oxides and iron phyllosilicates that offer a unique …
[HTML][HTML] Snow depth mapping with unpiloted aerial system lidar observations: a case study in Durham, New Hampshire, United States
Terrestrial and airborne laser scanning and structure from motion techniques have emerged
as viable methods to map snow depths. While these systems have advanced snow …
as viable methods to map snow depths. While these systems have advanced snow …
Early diagenesis of iron and sulfur in Bornholm Basin sediments: The role of near-surface pyrite formation
Pyrite formation in marine sedimentary environments plays a key role in the global
biogeochemical cycles of carbon, sulfur and iron, regulating Earth's surface redox balance …
biogeochemical cycles of carbon, sulfur and iron, regulating Earth's surface redox balance …