What type of volcanic products (lava flows, lava domes, or pyroclastic material) and types of volcanoes would you expect from an eruption of basalt? of andesite?
of dacite? of rhyolite? If there is more than one type of volcanic product, rank them from most abundant to least abundant.
What will be an ideal response?
Basaltic magma:
Products: (most abundant) lava flows, pyroclastic material, lava domes (least abundant).
Volcano types: shield volcanoes, cinder cones
Andesitic magma:
Products: (most abundant) pyroclastic material, lava flows, lava domes (least abundant).
Volcano types: cinder cones, composite volcanoes
Dacitic magma
Products: (most abundant) pyroclastic material, lava domes, lava flows (least abundant).
Volcano types: composite volcanoes, dome complexes
Rhyolitic magma
Products: (most abundant) pyroclastic material, lava domes, lava flows (least abundant).
Volcano type: dome complexes
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Which of the following is correct in regards to the geologic time scale?
A) An epoch is composed of one or more periods. B) The largest defined unit is an eon or, according to some, a supereon. C) An era is the smallest unit of geologic time. D) Every period is composed of 2 epochs.
Which of these Central American countries is a model of forest conservation?
A. Costa Rica B. Nicaragua C. Panama D. Honduras
When an unfortunate bug splatters on the windshield of a moving car, which quantity experiences the same change?
A. acceleration. B. speed. C. both of these D. none of the above
What is Earth's average density, what are the average surface rock densities, and what does this tell us
about the interior of Earth? What will be an ideal response?