Level 45
Level 46

Vulcanicity


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vulcanism
the movement of liquid rx inside or on the Earth's crust
intrusive
activity of magma in crust
volcano
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
sill
magma that intruded between horizontal layers and solidifies
laccolith
intrusive igneous rx similar to sill... injected magma lifts up overlaying rock layers... results in dome like structure
lava flow
liquid rx material that flows out on surface from underground sources
11,033 m
Greatest ocean depth
clay
A natural, earthly material that retains its shape and hardens when fired
tephra
ejected solids
iceberg in water
10% above surface
where mountains exist
thick 'roots' of rx extended deep into crust
as erosion of continents occurs
sediment transported from land and deposited on ocean floor
net result
continent becomes lighter
vertical
movement cause by isostacy is
constructive forces
build up or add to crust ((diastrophism and vulcanism))
alluvium
a deposit of fine material such as sand left by flowing flood water in a river valley
Weathering
breaking down rocks
capillary action
A proccess powered by adhesion that causes water molecules to move upward through a narrow tube such as the stem of a plant.
and 3 units
measure of average kinetic energy (motion) of individual molecules in matter
theory of isostacy
continents float in granite crust
laccoltin
dome shaped intruded mass of igneous rx
Vulcanicity
Refers to all volcanic activity related to magma being forced into the crust
Volcanoes
Openings within the earths crust from which ash, lava and gases erupt
Volcanic bombs
Crusted over ash deposits
Atmosphere
This is a mixture of gases that surrounds Earth. In addition to containing the oxygen you need to breathe, it protects you from the sun's damaging rays and is always changing.
Change
To make different. Some changes are predictable and re-occur (are cyclic). Change is natural and ongoing
Constructive plate margins
Plates are moving away from each other
Alphanumeric Grid
Uses letters and numbers, often used on road maps, identifies general location.
Basaltic
From from the upward movement of mantle material. This magma is low in silica which makes it more fluid magma that allows gas bubbles to expand
Andesitic
Lava is formed at destructive plate margins where crust is being destroyed. Formed from silica rich magma that is very viscous
Rhyolite
Lava is formed at destructive and collision margins and has the same characteristics as Andesitic lava
Charles Doolittle Walcott
discovered an incredibly well preserved bed of Cambrian fossils, 505 my old
Pyroclastic material
Made up of a wide range of volcanic fragments including ash, lapilli and larger volcanic bombs
Lahars
Ash mixed with rain or melt water to form fast moving mudflows
clay/loam
S. Podsol soil material (MP)
Vent eruptions
Lava escapes from a single cone shaped vent
Shield Volcano
fluid lava flows
Acid or dome volcanoes
Steep sides convex cones consisting of rhyolitic lava. Slopes are very steep and convex
Geysers
Intermittent, forceful discharge of superheated water ejected from the surface
Azienda Agricola
Regulations must satisfy the CPU criteria
Sills
Horizontal intrusions along the lines of bedding planes of predicting rock
Level 47