A5073504754- Planetary Science and Exploration
- Geology and Paleoclimatology Research
- Astro and Planetary Science
- Geological formations and processes
- Space Exploration and Technology
- Tree-ring climate responses
- Hydrology and Sediment Transport Processes
- Aeolian processes and effects
- Plant Water Relations and Carbon Dynamics
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Hydrocarbon exploration and reservoir analysis
- Cryospheric studies and observations
- Space Science and Extraterrestrial Life
- Pleistocene-Era Hominins and Archaeology
- Remote Sensing and LiDAR Applications
- 3D Surveying and Cultural Heritage
- Landslides and related hazards
- Geochemistry and Geologic Mapping
- Remote Sensing and Land Use
- Geological and Geochemical Analysis
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Remote Sensing in Agriculture
- Atmospheric Ozone and Climate
University of New Mexico
2016-2025
Janelia Research Campus
2025
Howard Hughes Medical Institute
2025
Planetary Science Institute
2015
Boston University
1990-1993
University of California, Los Angeles
1987
Research Article| January 01, 2010 Fluvial form in modern continental sedimentary basins: Distributive fluvial systems G.S. Weissmann; Weissmann 1Department of Earth and Planetary Sciences, University New Mexico, MSC03 2040, Albuquerque, Mexico 87131-0001, USA Search for other works by this author on: GSW Google Scholar A.J. Hartley; Hartley 2Department Geology & Petroleum Geology, School Geosciences, Aberdeen, Aberdeen AB24 3UE, UK G.J. Nichols; Nichols 3Department Royal Holloway, London,...
Abstract Vision provides animals with detailed information about their surroundings and conveys diverse features such as colour, form movement across the visual scene. Computing these parallel spatial requires a large network of neurons. Consequently, from flies to humans, regions in brain constitute half its volume. These often have marked structure–function relationships, neurons organized along maps shapes that directly relate roles processing. More than century anatomical studies...
Large areas in western China were wetlands or less arid between 40 and 30 ka, corresponding to the “Greatest Lake Period” on adjacent Tibetan Plateau. During last glacial maximum, some of these Chinese deserts again experienced wetter conditions; however, at same time sandy lands eastern desert belt an activation aeolian dunes. While interpretations mid-Holocene environment are controversial, it is quite likely that was more humid not only influenced by monsoon climate systems but also where...
Significance In contrast to earlier assertions that deserts in northern China are 10 6 years old, our multidisciplinary investigation the Hunshandake Sandy Lands, located eastern portion of China’s desert belt, shows this is ca. 4,000 old. This study documents dramatic environmental and landscape changes during last 10,000 years. For first time knowledge we present a case desertification mainly triggered by hydrological geomorphological system, associated with climate change at 4.2 ka. Our...
Recent analysis of modern aggradational continental sedimentary basins reveals that sedimentation patterns are dominated by distributive fluvial systems (DFSs).The Salt Wash Member the Late Jurassic Morrison Formation has previously been described as a fan-shaped system.This study characterizes facies variations across DFS to qualitatively test predicted trends in conceptual models.Notable proximal-to-distal include change total thickness succession from 174 m 40 m, and average grain size...
On November 5–8, 2019, the "Mars Extant Life: What's Next?" conference was convened in Carlsbad, New Mexico. The gathered a community of actively publishing experts disciplines related to habitability and astrobiology. Primary conclusions are as follows: A significant subset attendees concluded that there is realistic possibility Mars hosts indigenous microbial life. powerful theme permeated key search for martian extant life lies identifying exploring refugia ("oases"), where conditions...
Tree ring data have been used to reconstruct the mean late-season (June through January) temperature at a timberline site in Sierra Nevada, California, for each of past 2000 years. Long-term trends reconstruction are indicative 125-year periodicity that may be linked solar activity as reflected radiocarbon and auroral records. The results indicate both warm intervals during Medieval Warm Epoch ( approximately A.D. 800 1200) cold Little Ice Age 1200 1900) closely associated with period....
Abstract Ringwidth variations from temperature-sensitive upper timberline sites in the Sierra Nevada show a marked correspondence to decadal pattern of volcanic sulfate aerosols recorded Greenland ice-core acidity profile and significant negative growth response individual explosive events. The appearance single events mid-latitude tree-ring record, connection with evidence arctic historical records Mediterranean, indicates that majority these represent climatically effective eruptions,...
Research Article| August 01, 2015 Recognition and importance of amalgamated sandy meander belts in the continental rock record Adrian J. Hartley; Hartley 1Department Geology Petroleum Geology, University Aberdeen, Aberdeen AB24 3UE, UK Search for other works by this author on: GSW Google Scholar Amanda Owen; Owen Alistair Swan; Swan Gary S. Weissmann; Weissmann 2University New Mexico, Department Earth Planetary Sciences, MSC03 2040, Albuquerque, Mexico 87131-0001, USA Barbara I. Holzweber;...
Avulsion processes have been observed and analyzed using field based studies, however, they rarely through use of satellite imagery even though such an approach allows documentation spatial temporal variations the resulting deposits. In order to document changes that are occurring at Caronal avulsion on Taquari River, Brazil, a time series LANDSAT from 1985 present (2010) was compiled. As July 2010, shows is not yet complete, with discharge being routed both parent channel in floodbasin. The...
Abstract Intense debate persists about the timing and magnitude of wet phases in East Asia deserts since late Pleistocene. Here we show reconstructions paleohydrology Gobi Desert last interglacial using satellite images digital elevation models (DEM) combined with detailed section analyses. Paleolakes a total area 15,500 km 2 during Marine Isotope Stage 5 (MIS 5) were identified. This expanded lake system was likely coupled to an 800–1000 northward expansion humid region China, associated...
The majority of sediment transport to the world's oceans is routed via large deltas. We examine controls on delta apex location using a database 84 largest Of dataset, 94% apices are controlled by either bedrock valleys (80%) or Pleistocene alluvial (14%), suggesting that principal control modern development valley exit and/or bedslope-mediated avulsion and not hydrodynamic backwater length. Valley may have been as important in rock record it today, should be considered key development....
Mountain areas are among the most threatened environments worldwide.These sensitive systems suffer from human encroachment, resource extraction, and subsequent environmental degradation. ecosystems also extremely to climate variability with impacts on snow ice cover, hydrologic response, sediment yield. From this perspective, mountain can be viewed as one of “canaries in coal mine” for entire global system.
Abstract Previous investigations along Curiosity 's traverse in Gale crater have explored the relationship between orbital and situ observations. This work aims to better understand geologic environment of units only observable from orbit compare them properties examined by . Here, we map an erosion‐resistant dark‐toned mantling unit that overlies modern topography Aeolis Mons (informally known as Mt. Sharp) this two other previously mapped resistant units, marker band mound skirting (MSU),...