Late Mississipian paleoseismites from southeastern West Virginia and southwestern Virginia

Active tectonics in Eastern Lunana (NW Bhutan): Implications for the seismic and glacial hazard potential of the Bhutan Himalaya

“…Offset of host sediment along the margins of the dikes occurs and a maximum offset of about 5 cm has been observed ( Figure 7). The upper ends of some dikes inject discordantly into the host sediment and locally drag the sedimentary layering of the host walls upward for a few centimeters indicating rapid injection from below [Stewart et al, 2002]. The dikes are sealed by a $50 cm thick horizontal sand layer.…”

Volcanosedimentary paleoenvironments of Ediacaran fossils in Newfoundland

“…6C-6E), Bristy Cove fossil locality of the lower Briscal Formation, and Portugal Cove South fossil locality of the lower Trepassey Formation. Study of on May 2, 2014 gsabulletin.gsapubs.org Downloaded from polished slabs and sedimentary structures at the fossil localities supports other genetic models, including tempestites (Seilacher, 1982), terrestrial tuffs (Fisher and Schminke, 1984;Cas and Wright, 1987), seismites (Greb and Dever, 2002;Stewart et al, 2002;Wheeler, 2002;Agnon et al, 2006), tsunamites (Atwater et al, 1992;Atwater and Hemphill-Haley, 1997;Kelsey et al, 2005), and paleosols (Retallack, 1997;Retallack, 2011aRetallack, , 2012a.…”

“…Seismites are beds deformed during ground shaking by earthquakes, and they include both brittle and plastic deformation, as well as load casting, sand volcanoes, and clastic dikes (Greb and Dever, 2002;Stewart et al, 2002;Takada and Atwater, 2004;Agnon et al, 2006). Several likely seismite horizons were seen in the Mistaken Point Formation: including convolute lamination ( Fig.…”

“…A postulated forearc tectonic setting of the Conception Group (Hughes and Brückner, 1971;Nance et al, 1991;Barr and Kerr, 1997) has stimulated volcanosedimentary models of marine burial of vendobiont fossils by nonerosive volcanic ash (Jenkins, 1992;Seilacher, 1992Seilacher, , 1999. As a forearc sequence, other bedscale models are also worth consideration, including contourites (Stow, 1979;Stow et al, 1998), tempestites (Seilacher, 1982), seismites (Wheeler, 2002;Greb and Dever, 2002;Stewart et al, 2002;Agnon et al, 2006), tsunamites (Atwater et al, 1992;Atwater and Hemphill-Haley, 1997;Kelsey et al, 2005;Cisternas et al, 2005), ash-fall and ash-fl ow tuffs (Sparks and Huang, 1980;Cas and Wright, 1987;Allen and Cas, 1998), and paleosols (Retallack, 1997(Retallack, , 2012a(Retallack, , 2013a.…”

Sand injectites at the base of the Coconino Sandstone, Grand Canyon, Arizona (USA)

“…Crack depth is directly related to the amount of offset and the distance from the fault (i.e., crack depth is related to energy release along the fault). The cracks are similar in size to other clastic dikes (Reimnitz and Marshall, 1965;Bourgeois and Johnson, 2001;Stewart et al, 2002). The Bright Angel Fault (and its associated faults) is an appropriate tectonic setting for such features to form.…”