A5026332479- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Coral and Marine Ecosystems Studies
- Geological and Geophysical Studies
- Ocean Acidification Effects and Responses
- Paleontology and Evolutionary Biology
- Marine and environmental studies
- Geological and Geophysical Studies Worldwide
- Marine and coastal plant biology
- Geochemistry and Elemental Analysis
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Geography Education and Pedagogy
- Geological and Geochemical Analysis
- Geological formations and processes
- Educational Games and Gamification
- Methane Hydrates and Related Phenomena
- Isotope Analysis in Ecology
- Evolution and Paleontology Studies
- Marine and fisheries research
- Geological Modeling and Analysis
- Innovative Teaching and Learning Methods
- Cephalopods and Marine Biology
- Ichthyology and Marine Biology
The University of Texas at Austin
2016-2025
Harvard University
2014-2017
University of Southern California
2010-2014
Southern California Earthquake Center
2012-2014
Southern California University for Professional Studies
2012
Queen's University
2008
Abstract During the earliest Triassic microbial mats flourished in photic zones of marginal seas, generating widespread microbialites. It has been suggested that anoxic conditions shallow marine environments, linked to end‐Permian mass extinction, limited mat‐inhibiting metazoans allowing for this microbialite expansion. The presence a diverse suite proxies indicating oxygenated sea‐water (metazoan fossils, biomarkers and redox proxies) from successions have, however, challenged inference...
Abstract Severe global climate change led to the deterioration of environmental conditions in oceans during Toarcian Stage Jurassic. Carbonate platforms Western Tethys Ocean exposed Alpine Tethyan mountain ranges today offer insight into this period upheaval. In addition informing understanding deep time, effect ancient carbon cycle perturbations on carbonate has important implications for anthropogenic change; patterns early are similar those occurring modern oceans. This study focuses...
Abstract The aftermath of the latest Permian mass extinction is a key interval for evolution modern marine ecosystems. It has been hypothesized that magnitude delayed subsequent recovery, and so to test this, we undertook highest resolution study date post‐extinction (Griesbachian) microbialite unit on Great Bank Guizhou, south China. benthic community from taxonomically diverse when compared other coeval deposits, recording both inarticulate articulate brachiopods, crinoids, echinoids,...
Marine calcifiers produce calcareous structures (e.g. shells, skeletons or tests) and are therefore sensitive to ocean chemistry. Nevertheless, the long-term evolutionary consequences of marine carbonate changes not well understood. This article compares non-calcareous responses chemistry throughout Phanerozoic Eon (541 million years ago present). To accomplish this, we calculated proportional wall-type diversity, origination rates extinction for 2282 benthic foraminiferal genera. Calcareous...
Abstract The response of shallow‐marine ecosystems to the Paleocene‐Eocene Thermal Maximum (PETM) is understudied, and analyses that do exist typically focus on larger benthic foraminifera coral‐algal reef mound evolution. Here we investigate dynamics marine assemblages across PETM in Kozina Čebulovica sections (Slovenia) Adriatic Carbonate Platform. Our results show significant ecological changes associated with a protracted recovery into Shallow Benthic Zone (SBZ) 6. compositional change...
Crustose coralline algae (CCA) are key producers of carbonate sediment on reefs today. Despite their importance in modern reef ecosystems, the long-term relationship CCA with development has not been quantitatively assessed fossil record. This study includes data from 128 Cenozoic coral collected Paleobiology Database, Paleoreefs as well original literature and assesses correlation abundance taxonomic diversity (both corals dwellers) framework reefs. Chi-squared tests show type is...
Abstract The evolutionary success of reef-building corals is often attributed to photosymbiosis, a mutualistic relationship scleractinian developed with zooxanthellae; however, because zooxanthellae are not fossilized, it difficult (and contentious) determine whether ancient harbored symbionts. In this study, we analyze the δ 15 N skeletal organic matrix in suite modern and fossil (zooxanthellate- azooxanthellate-like) varying levels diagenetic alteration. Significantly, report first...
Abstract Lagerstätten—deposits of exceptionally preserved fossils—offer vital insights into evolutionary history. To date, only three Konservat-Lagerstätten are known from Early Jurassic marine rocks (Osteno, Posidonia Shale, and Strawberry Bank), all located in Europe. We report a new assemblage fossils Alberta, Canada, the first Konservat-Lagerstätte described North America. The Ya Ha Tinda includes articulated vertebrates (fish, ichthyosaurs), crinoids, crustaceans, brachiopods, abundant...
ABSTRACT Konservat-Lagerstätten provide the most complete snapshots of ancient organisms and communities in fossil record. In Mesozoic, these deposits are rarely found marine facies outside Oceanic Anoxic Event (OAE) intervals, suggesting that OAEs set stage for exceptional preservation. Although anoxia does not guarantee survival non-biomineralized tissues or articulated skeletons, other OAE phenomena may promote their conservation. Here, we test this hypothesis with a taphonomic analysis...
Abstract Konservat-Lagerstätten—deposits with exceptionally preserved fossils—vary in abundance across geographic and stratigraphic space due to paleoenvironmental heterogeneity. While oceanic anoxic events (OAEs) may have promoted preservation of marine lagerstätten, the environmental controls on their taphonomy remain unclear. Here, we provide new data mineralization fossils three Lower Jurassic Lagerstätten—Strawberry Bank (UK), Ya Ha Tinda (Canada), Posidonia Shale (Germany) —and test...