Observations from 145 submersible dives are used to create a database of mid-ocean ridge scarp topography and lithology. Seafloor lithologies are classified into extrusives, basaltic talus, dykes, gabbros and serpentinites, and the dive locations are broadly classified according to whether they are close to transform valleys and as a function of ridge spreading rate. The database is used to det...

We have developed a new quantitative method to estimate paleohorizontal in granitic plutons using the aluminum-in-hornblende (AH) barometer. The method is used to correct previously published paleomagnetic data from the 93–96 Ma Mount Stuart batholith of the Cascades Mountains, Washington State, for the effects of postemplacement tilting. AH barometry was done on 46 samples from the batholith u...

Abstract Petrographic observations combined with mineral compositional analyses constrain the phase relations of prograde metamorphosed serpentinites in Bergell contact aureole (Italy). In a 1500 m profile perpendicular to north-eastern edge intrusion, seven dehydration reactions ran completion. Three previously undocumented have been identified within 70 intrusive contact: olivine + anthophyll...

Accretionary and collisional orogeny are often accompanied by the disturbance of geothermal gradient, leading to high-temperature metamorphism. High-temperature metamorphic rocks significant in their ability help reconstruction thermal histories orogenic belts. The Tianshan Orogenic Belt, at southwest margin Central Asian is a record long-term subduction–collision–post-collision process that ha...