Research Article| May 01, 1994 The Quaternary marine terraces of Santa Cruz, California: Evidence for coseismic uplift on two faults ROBERT S. ANDERSON; ANDERSON 1Department Earth Sciences and Institute Tectonics, University California, California 95064 Search other works by this author on: GSW Google Scholar KIRSTEN M. MENKING GSA Bulletin (1994) 106 (5): 649–664. https://doi.org/10.1130/0016-7606(1994)106<0649:TQMTOS>2.3.CO;2 Article history first online: 01 Jun 2017 Cite View This...

Well-preserved shorelines in Estancia basin and a relatively simple hydrologic setting have prompted several inquiries into the basin's balance for purpose of estimating regional precipitation during late Pleistocene. Estimates ranged from 86% to 150% modern, disparity largely result assumptions about past temperatures. In this study, we use an array models surface-water runoff, groundwater flow, lake energy examine previously proposed scenarios Pleistocene climate. Constraints imposed by...

Research Article| November 01, 2003 Contributions of La Niña and El Niño to middle Holocene drought late moisture in the American Southwest Kirsten M. Menking; Menking 1Department Geology Geography, Vassar College, Poughkeepsie, New York 12604, USA Search for other works by this author on: GSW Google Scholar Roger Y. Anderson 2Department Earth Planetary Sciences, University Mexico, Albuquerque, Mexico 87131, (2003) 31 (11): 937–940. https://doi.org/10.1130/G19807.1 Article history received:...

Chemical analyses of the acid-soluble and clay-size fractions sediment samples (1500-yr resolution) reveal oscillations lake salinity glacial advances in core OL-92 back to 155,000 yr B.P. Relatively saline conditions are indicated by abundance carbonate smectite (both pedogenic authigenic), reflected Ca, Sr, Mg suite, Cs 2 O, excess MgO, LOI (loss on ignition) fraction. Rock flour produced during is represented detrital plagioclase biotite fraction, ratio which remains essentially constant...

Abstract Development is known to impair stream water quality at moderate high levels of urbanization, but the effects low-density urban expansion, kind occurring on outskirts many cities, remain unclear. We examined five suburban headwater streams in Duchess County, New York whose watersheds contained between 4.7% and 34% impervious surface cover. measured Cl- nitrate-N (NO3-N) concentrations samples taken four six sites each winter summer. Even low population cover, both NO3-N exceeded...

Abstract Eolian and subaqueous landforms composed of gypsum sand provide geomorphic evidence for a wet episode at the termination glacial climate in southwestern North America. Drying pluvial Lake Estancia, central New Mexico, occurred after ca. 12,000 14 C yr B.P. Thereafter, eolian on old lake floor, constructed sand, were overridden by rising water, modified processes, organized into beach ridges along lake's eastern shore. Preservation preexisting shallow suggests abupt changes level...

Sediment grain size, carbonate content, and stable isotopes in 70-cm-long (∼1500-yr) channel samples from Owens Lake core OL-92 record many oscillations representing climate change the eastern Sierra Nevada region since 155,000 yr B.P. To first order, records match well marine δ 18 O record. At Lake, however, last interglaciation appears to span entire period 120,000 50,000 B.P., according our chronology, was punctuated by numerous short periods of wetter conditions during an otherwise dry...

Abstract Much attention has been given to the impairment of streams in urban areas and value green space preventing degradation. However, few studies have examined whether can remediate water quality downstream contaminant sources. To assess degree which an ecological preserve was able ameliorate upstream impairments, we changes conductivity, total inorganic nitrogen (TIN), a family biotic index (FBI) for benthic macroinvertebrates partially urbanized stream eastern New York state, USA. We...

Abstract The 5000 km2 topographically closed Estancia basin in central New Mexico has been the focus of several palaeoclimatic studies based on changes level late Pleistocene Lake Estancia. A large, unknown volume surface runoff and groundwater from adjacent mountains contributed to hydrological balance during highstands lowstands. US Department Agriculture model SWAT (Soil Water Assessment Tool) Geological Survey flow MODFLOW, with LAK2 package, were used this study estimate water under...

Lacustrine sediments from the Estancia Basin of central New Mexico reveal decadal to millennial oscillations in volume Lake during Last Glacial Maximum (LGM) time. LGM consist authigenic carbonates, detrital clastics delivered lake stream flow pulses, and evaporites that precipitated mudflats exposed lowstands were subsequently blown into lake. Variations sediment mineralogy thus reflect changes hydrologic balance quantified using Rietveld analysis X-ray diffraction traces. Radiocarbon dates...

Students in an undergraduate geomorphology course used tablet computers equipped with Global Positioning System (GPS) receivers and Geographic Information Systems (GIS) software to map the current location of a stream that crosses Vassar College campus Dutchess County, New York. They also digitized position on aerial photographs taken 1959 determine meander migration rates over last ~45 years ~0.2 m/yr. The purpose exercise was introduce basic GIS skills, such as georeferencing air photos,...

Abstract A high-resolution time series of diatoms from the Estancia Basin central New Mexico, USA, reveals decadal to millennial changes in water chemistry during Last Glacial Maximum (LGM) and suggests that groundwater leakage limited size Lake highstands. Previous work showed lake expanded at least five times LGM, with each highstand reaching same elevation; numerical modeling experiments highstands required increases precipitation 1.5–2 modern but also demonstrated these conditions could...

Entire fields within the Earth sciences now exist in which computer modeling has become primary work of discipline. Undergraduate geology/Earth science programs have been slow to adapt this change, and offerings frequently do not meet geology students' needs. To address these problems, a course Computer Modeling Sciences developed at Vassar College. The uses STELLA (Structural Thinking Experimental Learning Laboratory with Animation) iconographical box software teach fundamentals dynamical...