Conference Papers

No abstract available.

No abstract available

The accumulation of gypsum on carbonate stone has been investigated through exposure of fresh samples of limestone and marble at monitored sites, through examination of alteration crusts from old buildings and through laboratory experiments. Several factors contribute to gypsum accumulation on carbonate stone. Marble or limestone that is sheltered from direct washing by rain in an urban

The Hayward fault, thought a likely source of large earthquakes in the next few decades, has generated two large historic earthquakes (about magnitude 7), one in 1836 and another in 1868. We know little about the 1836 event, but the 1868 event had a surface rupture extending 41 km along the southern Hayward fault. Right-lateral surface slip occurred in 1868, but was not well measured...

The March 13, 1992 Ms = 6.8 Erzincan earthquake in Turkey is highlighted here. The epicenter of this earthquake was located 7.7 km from the eastern end of the North Anatolian fault. The strong motions recorded in Erzincan had peak ground accelerations of approximately 0.5 g, accompanied by a pulse of 2 seconds. The duration of the earthquake was 7 seconds. This earthquake caused collapse...

Varying weight percentages of an Ottawa sand, benzyltriethylammonium-bentonite (BTEA-clay), Wyoming bentonite (Na-clay), and water were mixed uniformly and compacted to simulate sand-and-clay liners for waste-disposal facilities. The hydraulic conductivities of the compacted soil cores were measured in triplicate. The hydraulic conductivities of cores containing 92 percent sand and 8...