Ice Volcanism on Ariel

The GISP Ice Core Record of Volcanism Since 7000 B.C.

Volcanism on Mars

Amazonian The youngest of the geologic epochs on Mars identified through geoiogic mapping of superposition relations, and the area! density of impact craters. caldera An irregular collapse feature formed over the evacuated magma chamber within a volcano. central volcano Emplacement of volcanic materials from a centralized source vent rather than along a distributed line of vents, composite volc...

Acromegaly Ariel

In the majority of cases, acromegaly is due to GH hypersecretion by a somatotroph pituitary tumor. The etiology of acromegaly is not known, and may be related to GHRH hypersecretion, intn’nsic pituitary defect, or a combination thereof: Recent physiologic data and molecular biology techniques provide insights into the pathophysiology of this condition. Treatment options include surgery, radiati...

Chapter 43 - Volcanism on Io

differentiation The process by which planets and satellites develop layers or zones of different chemical and mineralogical composition. flyby Term used to describe the close approach of a spacecraft to a body, without the spacecraft going into orbit around that body. Galilean satellites The four largest satellites of Jupiter (Io, Europa, Ganymede, Callisto), named after their discoverer Galile...

Volcanism and Tectonics on Venus

We review recent developments in the study of volcanism and tectonics on Venus. Venus’s crust is basaltic, dry, and probably about 30 km thick. The mantle convects, giving rise to plumes, and has a similar composition and mean temperature (∼1300◦C), but a higher viscosity (∼1020 Pa s), than that of the Earth. Inferred melt generation rates constrain the lithospheric thickness to between 80 and ...