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Paleozoic echinoderm hangovers: Waking up in the Triassic: REPLY

Paleozoic echinoderm hangovers: Waking up in the Triassic: REPLY

Paleozoic echinoderm hangovers: Waking up in the Triassic: COMMENT

Dating the Paleoproterozoic snowball Earth glaciations using contemporaneous subglacial hydrothermal systems

The presence of Paleoproterozoic glacial diamictites deposited at low latitudes on different continents indicates that three or four worldwide glaciations occurred between 2.45 and 2.22 Ga. During that time period, the first atmospheric oxygen rise, known as the Great Oxidation Event (GOE), occurred, implying a potential connection between these events....

Introducing the Xenoconformity

Increased mud deposition reduces stromatolite complexity

Microbial mat growth can produce diagnostic delicate structures in low-energy environments, but mat morphology, and thus preservation of delicate structures as morphological biosignatures, is affected by mud accumulation. In Lake Joyce, Antarctica, varying rates of siliciclastic mud deposition affected the morphology of partially calcified microbial...

Global biogeography of Albian ammonoids: A network-based approach

Large-scale biogeographic provinces of Cretaceous ammonoids, as currently defined in the literature, were delimited using qualitative assessments of taxonomic inventories. Using aggregated species occurrences in the Paleobiology Database, we generated a geographic network to quantify connectivity of Albian epicontinental basins and used the flow-based...

Paleozoic echinoderm hangovers: Waking up in the Triassic: COMMENT

Millennial-scale ocean dynamics controlled export productivity in the subtropical North Pacific

The integrated effects of ocean-climate dynamics on export production in the North Pacific have remained elusive. We present a 91 k.y. export productivity (EP) record based on sedimentary reactive phosphorus from the western subtropical North Pacific. On a millennial time scale, EP decreased during Northern Hemisphere cold events when atmospheric dust...

Plateau subduction, intraslab seismicity, and the Denali (Alaska) volcanic gap

Tectonic tremors in Alaska (USA) are associated with subduction of the Yakutat plateau, but their origins are unclear due to lack of depth constraints. We have processed tremor recordings to extract low-frequency earthquakes (LFEs), and generated a set of six LFE waveform templates via iterative network matched filtering and stacking. The timing of...

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