EXAM TWO II Flashcards
_____ is formed a smooth, ropy-looking basaltic lava with low viscosity and has a twisted or ropey texture:
Pahoehoe basalt
______ is lava that issue from numerous fissures and covering extensive areas to thickness of hundreds of kilometers:
Flood Basalt
________ is a viscous basalt that is blocky appearing with sharp edges:
Aa basalt
The Sierra Nevada Range is an example of a _______:
Batholith
_________ would be an example of a volcano or volcanic area composed of flood basalts:
Columbia Plateau
_________ is pyroclastic material composed of fine, glassy garments or shards of silica:
ash
A _______ describes any visible emission of particles and gas (aerosols and vapors) from a volcano:
volcanic cloud
A(n) ________ is incandescent
volcanic debris buoyed up by hot gases that moves downslope in an avalanche fashion:
Nuee ardente
A _____ is a mudflow on slope of volcano created when layers of ash and debris becomes saturated with water and move downslope
lahar
_______ are walnut-sized pyroclastic material:
Lapilli
_______ is a broad, slightly domed-shaped structure produced by mild eruption of large volumes of fluid, basaltic lava:
Shield Volcano
Most ______-type volcanoes are located along the rim of the Pacific Ocean
composite
Volcanic ______ are streamlined pyroclastic fragments ejected from volcano while molten:
bombs
