A5082735822- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Geological and Geophysical Studies
- Tree-ring climate responses
- Scientific Computing and Data Management
- Archaeology and ancient environmental studies
- Geological Modeling and Analysis
- Research Data Management Practices
- Paleontology and Stratigraphy of Fossils
- Geological and Tectonic Studies in Latin America
- Landslides and related hazards
- Methane Hydrates and Related Phenomena
- Pacific and Southeast Asian Studies
- Atmospheric and Environmental Gas Dynamics
- Evolution and Paleontology Studies
- Geological Studies and Exploration
- Reservoir Engineering and Simulation Methods
- Geochemistry and Geologic Mapping
- Forensic Anthropology and Bioarchaeology Studies
- Geomagnetism and Paleomagnetism Studies
- earthquake and tectonic studies
- Fire effects on ecosystems
- Paleopathology and ancient diseases
- Geological and Geochemical Analysis
University of Minnesota
2015-2024
Continental Scientific Drilling Facility
2023-2024
Continental (United States)
2023-2024
University of Minnesota System
2009-2022
Twin Cities Orthopedics
2015-2020
University of Minnesota, Duluth
2020
Stanford University
2019
University of California, Berkeley
2019
University of South Dakota
2018
Instituto Pirenaico de Ecología
2017
High-resolution titanium (Ti) data obtained using an ITRAX XRF core scanner from a laminated sediment the Laguna de Juanacatlán, western central Mexico yield unique high-resolution record of runoff (precipitation) change for last 2000 years. In absence reliable, long-term meteorological records, comparison Ti with information rich Spanish colonial period archives and post-Independence period, confirms that is proxy runoff. This interpretation supported by other surrounding region, primarily...
Abstract. The role that climate and environmental history may have played in influencing human evolution has been the focus of considerable interest controversy among paleoanthropologists for decades. Prior attempts to understand side this equation centered around study outcrop sediments fossils adjacent where fossil hominins (ancestors or close relatives modern humans) are found, from deep sea drill cores. However, often highly weathered thus unsuitable some types paleoclimatic records,...
Although climate change is considered to have been a large-scale driver of African human evolution, landscape-scale shifts in ecological resources that may shaped novel hominin adaptations are rarely investigated. We use well-dated, high-resolution, drill-core datasets understand dynamics associated with major adaptive transition the archeological record ~24 km from coring site. Outcrops preserve evidence replacement Acheulean by Middle Stone Age (MSA) technological, cognitive, and social...
Abstract Despite more than half a century of hominin fossil discoveries in eastern Africa, the regional environmental context evolution and dispersal is not well established due to lack continuous palaeoenvironmental records from one proven habitats early human populations, particularly for Pleistocene epoch. Here we present 620,000-year record Chew Bahir, southern Ethiopia, which proximal key sites. Our documents potential influence different episodes climatic variability on biological...
Abstract Peatlands of Southeast Asia store large pools carbon but the mechanisms peat accumulation in tropical forests remain to be resolved. Patch dynamics and forest disturbance have seldom been considered as drivers that can amplify or dampen rates accumulation. Here we used a modified piston corer, noninvasive geophysical measurements, geochemical paleobotanical techniques establish effect tree fall on swamp dominated by Shorea albida Brunei (Borneo). Carbon initially accumulated...
Abstract. The Towuti Drilling Project (TDP) is an international research program, whose goal to understand long-term environmental and climatic change in the tropical western Pacific, impacts of geological changes on biological evolution aquatic taxa, geomicrobiology biogeochemistry metal-rich, ultramafic-hosted lake sediments through scientific drilling Lake Towuti, southern Sulawesi, Indonesia. a large tectonic at downstream end Malili system, chain five highly biodiverse lakes that are...
The Permian witnessed some of the most profound climatic, biotic, and tectonic events in Earth’s history. Global orogeny leading to assembly Pangea culminated by middle time, included multiple orogenic belts equatorial Central Pangean Mountains, from Variscan-Hercynian system East Ancestral Rocky Mountains West. penultimate global icehouse peaked early transitioning full greenhouse conditions late constituting only example collapse on a fully vegetated Earth. Late Paleozoic Ice Age...
After the climatic and environmental context of hominin evolution in East Africa centred spotlight for decades, West gains increasing interest considering a pan-African early human history. However, long continuous continental climate records from this area illuminating regional hydroclimatic impacts differences across are missing. This is major shortcoming as fundamental offsets W-E hydroclimates expectable that may have influenced dispersal. Here we present million-year-old hydroclimate...
This paper presents a short description of the coring operations undertaken to recover full lacustrine sedimentary sequence from Chalco.Geophysical techniques were used determine distribution and thickness sediments in order select drilling site.Resonance frequencies determined H/V spectral ratios an area where lake reached 300 m thickness.Electromagnetic survey showed two changes electric resistivity which related sediment composition, first 100 120 m, increase volcanoclastic second 330 400...
Abstract Investigation of Lake Quinault in western Washington, including a reflection seismic survey, analysis piston cores, and preliminary mapping the steep, landslide-prone River catchment upstream lake, reveals evidence for three episodes earthquake disturbance past 3000 yr. These earthquakes triggered failures on lake’s underwater slopes delta front, as well subaerial landsliding, partial channel blockage, forced fluvial sediment aggradation. The ages events overlap with those...
Abstract. Phase 1 of the Colorado Plateau Coring Project (CPCP-I) recovered a total over 850 m stratigraphically overlapping core from three coreholes at two sites in Early to Middle and Late Triassic age largely fluvial Moenkopi Chinle formations Petrified Forest National Park (PFNP), northeastern Arizona, USA. took place during November December 2013 project is now its post-drilling science phase. The CPCP cores have abundant detrital zircon-producing layers (with survey LA-ICP-MS dates...
Abstract. The primary scientific objective of MexiDrill, the Basin Mexico Drilling Program, is development a continuous, high-resolution ∼400 kyr lacustrine record tropical North American environmental change. field location, in densely populated, water-stressed City region gives this particular societal relevance. A detailed paleoclimate reconstruction from central will enhance our understanding long-term natural climate variability tropics and its relationship with changes at higher...
Abstract. During the summer of 2011, Bighorn Basin Coring Project (BBCP) recovered over 900 m overlapping core from 3 different sites in late Paleocene to early Eocene fluvial deposits northwestern Wyoming. BBCP cores are being used develop high-resolution proxy records Paleocene–Eocene Thermal Maximum (PETM) and 2 (ETM2) hyperthermal events. These events short-term, large magnitude global warming associated with extreme perturbations earth's carbon cycle. Although PETM ETM2 occurred ~55–52...
Abstract. The Neogene and Quaternary are characterized by enormous changes in global climate environments, including cooling the establishment of northern high-latitude glaciers. These reshaped ecosystems, emergence tropical dry forests savannahs that found Africa today, which turn may have influenced evolution humans their ancestors. However, despite decades research we lack long, continuous, well-resolved records climate, ecosystem changes, surface processes necessary to understand...
Abstract. This article presents the scientific rationale for an ambitious ICDP drilling project to continuously sample Late Cretaceous modern sediment in four different sedimentary basins that transect equatorial Amazon of Brazil, from Andean foreland Atlantic Ocean. The goals this are document evolution plant biodiversity forests and relate biotic diversification changes physical environment, including climate, tectonism, surface landscape. These require long records each major across heart...
Seasonal dry tropical forest (STDF) is a widespread vegetation type in western Mexico. Generally, this of develops semihumid habitats where lacustrine basins are scarce, preventing documentation the history and dynamics using paleoecological approach. Here, we present palynological record from Santa Maria del Oro crater lake, located within distribution area STDF adjacent oak which gives insight into changes diversity human impact at site. Pollen data, combination with geochemical analysis...