The crustal structure around the Islas Marías Archipelago has been debated for a long time. An important unresolved question is where Rivera-North American plate subduction ends and Tamayo fracture zone begins, from SE to NW. Results TsuJal project have shed light on northwesternmost part of Jalisco block structure. It now clear that Sierra de Cleofas Escarpment comprise northwestern continuati...

Abstract The extent of continents in oceans is an important scientific, economic and political issue. crustal types seaward the necking zones volcanic passive margins are investigated. From a set high-quality seismic data from Namibia we discuss nature this crust, oceanic or continental. Here show that over ~100 km, crust shares few characteristics born accretion at slow-spreading ridge. We alt...

Sonobuoys provide an alternative to using long streamers while conducting multi-channel seismic (MCS) studies, in order to provide deeper velocity control. We present analysis and modeling techniques for interpreting the sonobuoy data and illustrate the method with ten overlapping sonobuoys collected in the Ross Sea, offshore from Antarctica. We demonstrate the importance of using the MCS data ...

The Basin and Range province is a broad, highly extended terrane embedded within the North Ameri-can western Cordillera that extends from Canada, through the western United States, and across much of Mexico. The province roughly occupies the space between the Cascade Ranges and Rocky Mountains in the north and the Sierra Nevada and the Colorado Plateau in the middle, and it engulfs the Sierra M...

Because helium and heat production results from a common source, a continental He crustal flux of 4.65*10 14 mol m 2 s 1 has been estimated based on heat flow considerations. In addition, because the observed mantle He /heat flux ratio at the proximity of mid-ocean ridges (6.6*10 14 mol J ) is significantly lower than the radiogenic production ratio (1.5*10 12 mol J ), the presence of a terrest...