T w o series of pyroxenes have been found in a layered teschenite sill, 22 m thick, emplaced in Late Permian coal measures in the Sydney Basin, New South Wales, Australia. The sill consists of 12 m of homogeneous teschenite, overlain by 6 m of picrite, then by 4 m of a layered sequence. The layering unit of this sequence is teschenite, a pyroxene-rich layer and a narrow leucocratic band. A whol...

BACKGROUND A site near Tuskegee, Alabama was examined for vector-host activities of eastern equine encephalomyelitis virus (EEEV). Land cover maps of the study site were created in ArcInfo 9.2 from QuickBird data encompassing visible and near-infrared (NIR) band information (0.45 to 0.72 microm) acquired July 15, 2008. Georeferenced mosquito and bird sampling sites, and their associated land co...

Trace element abundances in clinopyroxene (cpx) from cumulate xenoliths are used to characterize the nature of primitive magma-forming processes beneath the Aleutian island arc. Clinopyroxenes from deformed mafic and ultramafic xenoliths hosted in a Neogene-age mafic sill from Kanaga Island have widely varying trace element abundances (Sr=8–32, Y=2–64, Zr=2–38, Nd=0.65–16 ppm) that are generall...

features of the area. Sills of hornblende-porphyritic clioritc, are part of the Hedley Intrusive suite believed to bc Latf Triassic or Early Jurassi.: (199 Ma based on U-Pb dates 0 ' zircons from the Banbury stock, 3.5 kilometres west o' Hedley). In this location the sills, which vary.from I to 2f' metres in thickness, make up almost 50 per cent '3f thl: stratigraphic column whtxe they intrude ...

[1] Upper oceanic crust within the Cocos Plate offshore northwestern Costa Rica is dominated by sill intrusions of various ages, recognized regionally as smooth, high amplitude seismic reflections at the base of the sedimentary sequence and locally by dolerites and microgabbros recovered by drilling. Earlier interpretation of seafloor magnetic anomalies documented a set of spreading ridge jumps...

The morphology of the joint interface is described using geostatistical parameters such as the sill, range and slope of the initiaI part of the variogram. The methodology is also used to identify the scale effect and to determine the appropriate cutoff length of the sample which is representative for a direct shear test. The anisotropy characteristics of the interface are described using the si...

Sandstone intrusions are found in all sedimentary environments but have been reported most commonly from deep-water settings. They also appear to be more frequently developed in tectonically active settings where applied tectonic stresses facilitate development of high fluid pressures within the sediments. A variety of mechanisms have been cited as triggers for clastic intrusions. These include...

[1] Dilatational source deformations associated with two unusual M 3+ earthquakes in the area of the 2004–2008 Yellowstone, WY, accelerated uplift episode were identified through detailed analysis of moment tensor inversions. Pressurized hydrothermal fluids are suggested to be associated with the dilatational source processes of these unusual earthquakes, which is consistent with the mechanism ...

Synopsis: The Loch Leven basin (56° 12' N, 3° 23' W) in the Midland Valley of Scotland has been identified as the site of the primary impact of a low-angle oblique impact event dating from the end of the Carboniferous. Together with two further downrange structures, it forms a chain of craters which appear to have been produced by fragments of a large asteroid which disintegrated on impact. Top...