MAGMATISM ANG IGNEOUS ROCKS Flashcards
THE RELEASE OF MAGMA OUT OF EARTH’S SURFACE
VOLCANISM
THIS IS THE GENERATION OF MOLTEN ROCKS UNDERNEATH EARTH
MAGMATISM
_ OCCURS AS A RESULT OF THE PARTIAL MELTING OF THE MANTLE.
MAGMATISM
_ OCCURS WHEN SOME PART OF THE ROCKS MELT
PARTIAL MELTING
WHATRE THE THREE SIGNIFICANT EVENTS THAT SHOULD BE PRESENT IN THE MANTLE FOR THE ROCKS TO PARTIALLY MELT?
INCREASE IN TEMPERATURE
DECREASE OF PRESURE
ADDITION OF VOLATILES
__ MELTING HAPPENS IN WATER DURING SUBDUCTION, WHILE __ MELTING HAPPENS DUE TO CONVECTION IN THE MANTLE
FLUX MELTING
DECOMPRESSION MELTING
_ IS COMPOSED OF MATERIALS THAT ARE ALSO ABUNDANT TO EARTH
MAGMA
STRUCTURES CCAUSED WHEN MAGMA FLOWS UPWARD INTO CRACKS OR ARE SITUATED BETWEEN ROCK LAYERS, WHERE THEY COOL DOWN AND HARDEN INTO SLABS
INTRUSIONS
_ ARE VERTICAL STRUCTURES THAT DEVELOP WHEN MAGMA FLOWS THRU FRACTURES
DIKES
_ ARE BREAKS OR RUPTURES ON ROCKS WHERE THERE IS NO APPRECIABLE MOVEMENT THAT TOOK PLACE
FRACTURES
THEY ALSO HAVE THE APPEARANCE OF A WALL
DIKES
_ ARE FORMED WHEN MAGMA MOVES ALONG SEDIMENTARY BEDDING SURFACES
SILLS
THESE ARE USUALLY LARGE AND HORIZONTAL
ibang nasa isip mo no?
SILLS
_ REFER TO PATTERNS OF CRACKS THAT FORM WHEN MOLTEN ROCK COOLS.
COLUMNAR JOINTS
_ ARE FRACTURES OR CRACKS IN ROCKS DUE TO FORCES ACTING ON THE CRUST
JOINTS
_ ARE FORMED WHEN A MORE VISCOUS MAGMA INTRUDES BETWEEN SHALLOW SEDIMENTARY LAYERS
LACCOLITHS
THIS IS THE LARGEST INTRUSIVE IGNEOUS STRUCTURE WHICH HAS AN EXPOSURE OF MORE THAN 100KM. THEY’RE COMPOSED OF GRANITIC ROCK TYPES
BATHOLITHS
MOST VOLCANOES ALONG PALTE BOUNDARIES WHERE THE LEADING EDGE IS CONTINENTAL ARE THE RESULT OF _
THE MELTING OF THE LITHOSPHERE BECAUSE OF SUBDUCTION IN A NEARBY TRENCH
WHAT IS THE MOST ABUNDANT ELEMENT IN MAGMA
OXYGEN
WHICH OF THE FOLLOWING IS NOT AN INTRUSIVE IGNEOUS STRUCTURE?
columnar joint
dike
ridge
sill
ridge
THE VOLCANIC ISLANDS OF HAWAII ARE DUE TO _
HOT SPOTS
WHAT IS NOT A SITE OF VOLCANIC ACTIVITY?
TRANSFORM PLATE BOUNDARIES
