Lithologic, faunal, seismic, and isotopic evidence from the Blake Nose (subtropical western North Atlantic) links a massive release of biogenic methane approximately 55.5 million years ago to a warming of deep-ocean and high-latitude surface waters, a large perturbation in the combined ocean-atmosphere carbon cycle (the largest of the past 90 million years), a mass extinction event in benthic f...

The nomenclature for Kansas aquifers needs revision. Many of the names currently in use were derived in an ad hoc manner without the benefit of a consistent set of hydrogeologically based guidelines. Because nomenclature forms the basis of scientific discussion of hydrologic issues, names should be clearly defined and consistently applied in order to prevent erroneous or unintended hydrologic i...

A preliminary 1:24,000 scale surficial geologic map of the Detroit 7.5 minute topographic quadrangle, and surrounding areas, was produced to serve as a framework for future urban site assessment. The results show that the map area is a relict late Pleistocene glacial landscape on which is superimposed a Holocene system of streams, lakes and wetlands, and an Anthropocene landscape of manufacture...

Data analysis and modeling within the infrastructure of geographic information systems (GIS) applications are invaluable assets with respect to groundwater resource management and protection. In Florida, ground water comprises more than 90% of potable water resources, which are used by a population of more than 16 million. With an increase of more than 7000 residents per week, demands on Florid...

Recognition that channel form reflects a river's ability to erode rock has spawned stream-power models that estimate patterns of incision by approximating energy dissipation within a channel. Most commonly, these models assume channel width exponentially scales with drainage area, in part, because drainage area is easily extracted from digital elevation models (DEMs). However, this assumption i...

Ocean Drilling Program (ODP) Leg 156 examined hydrological, geochemical, structural, and sedimentological processes at the toe of the northern Barbados accretionary prism (Shipley, Ogawa, Blum, et al., 1995). As part of this program, more than 400 samples were collected from Sites 948 and 949 for grain-size analysis. The primary objective of these analyses was to accurately determine weight per...

Measurements acquired by the Mars Orbiter Laser Altimeter on board the Mars Global Surveyor indicate that large drainage systems on Mars have geomorphic characteristics inconsistent with prolonged erosion by surface runoff. We find the topography has not evolved to an expected equilibrium terrain form, even in areas where runoff incision has been previously interpreted. By analogy with terrestr...

In this paper numerous known spectral analysis methodologies available to geologic remote sensing are reviewed. According to their requirement for reference data, the techniques are categorized into knowledge-based (KB) or data-driven (DD) approaches. The two categories are comparatively studied and their advantages, disadvantages, and major geologic outcomes are emphasized. Next ways to bridge...