• Numerical models to evaluate the sensitivity of magma-poor and magma-rich passive margins. Crust-mantle decoupling at margins facilitates subduction initiation Magma-rich are too strong after cooling initiates within oceanic lithosphere. We present a new numerical modelling study (hyper-extended) continental In particular, we test how structure rheological stratification these two end-member ...

All published distributional data on recent benthic foraminifera of the North American Atlantic continental margin were archived into computerized catalogs. Cluster analysis of these data delimited seven large, marginally overlapping provinces exhibiting a congruous relationship with western North Atlantic water masses. The single major latitudinal faunal change occurs at Cape Hatteras.

In spite of numerous active and passive seismological investigations, the existence continuous or interrupted continental subduction below Western Alps is still open to debate. Many observations focus on Moho deeper part mantle, while reliable information Lithosphere-Asthenosphere Boundary (LAB) Alpine region scarce. Exploiting data from dense, broadband AlpArray Seismic Network we present a se...

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...

introduction there are some theories about the paleotethys event during the paleozoic that have been proposed by geologists (metcalfe, 2006). some scientist offered some pieces of evidence about the northern margin of gondwana (zhu et al., 2010). the paleotethys ocean and hercynian orogenic report first in iran, have been offered from the morrow and misho mountain (eftekharnejad, 1981). misho m...

The effect of transition regions between continental and oceanic structures on the propagation of L, waves from continental sources is examined. In particular, the attenuation due to variations in layer thickness in such transition regions is calculated and explained for a suite of simple models. The measured attenuation, due tq the geometry of the transition regions between the oceanic and con...