UNIT 3 - Diastrophism

Question 1

Features of diastrophism

Answer 1

Fold, Fault

Question 2

caused by compression pf the crustal blocks
Opposite forces (towards each other) results in wavelike formations of the terrain over large areas
can range in size from microscopic wrinkles to several hundred kilometers

Answer 2

folds

Question 3

Type of folds

Answer 3

Anticline, Syncline, Monocline, Basin, Dome, Symmetrical,

Question 4

convex

Answer 4

basin

Question 5

concave

Answer 5

dome

Question 6

geological structure which all the layers are bent in one direction

Answer 6

monocline

Question 7

sudden displacement of portions of the earth that is large in horizontal extent, a form of deformation by rupture and caused by the combination of compression and extension

Answer 7

Faults

Question 8

Surface along which displacement has taken place

Answer 8

Fault plane

Question 9

Rock which lie above the fault plane

Answer 9

Hanging wall

Question 10

rock which lie below the fault plane

Answer 10

footwall

Question 11

Postulated that the surface of the earth is made up of lithospheric plates

Answer 11

plate tectonics theory

Question 12

the earth outermost layer is fragmented into a dozen or more large and small plates that are moving relative to one another as they ride atop hotter more mobile material

Answer 12

Plate tectonics theory

Question 13

a massive irregulary shaped slab of solid rock, generally composed of both continental and oceanic lithosphere

Answer 13

tectonic plate

Question 14

what are the six major plates

Answer 14

eurasian, american, african, pacific, indian and antartic

Question 15

smallest tectonic plate

Answer 15

juan de fuca

Question 16

what drives the tectonic plates?

Answer 16

the slow movement of hot softened mantle below the rigid plates (seafloor-spreading by harry hess)

Question 17

in 1930s postulated the circular motion of the mantle carried the continents like a conveyor belt

Answer 17

arthur holmes

Question 18

a large scale deformation of the earths crust resulting in the formation of major structural feature of the earth surface

believed to be due to sea-floow spreading and consequent movement of the rigid plates that form the earth’s crust (plate tectonics)

Answer 18

diastrophism

Question 19

Type of plate boundaries

Answer 19

Divergent, Convergent, Tranform, plate boundary zone

Question 20

places where plates crash into each other

Answer 20

convergent

Question 21

plates are being pulled away from each other

Answer 21

divergent

Question 22

Orogenesis

Answer 22

oro means mountain and genesis means to come into being

Question 23

elongated series of mountain peaks connected to each other are called?

Answer 23

mountain ranges

Question 24

broad belt of mountain rangers are called?

Answer 24

cordillera

Question 25

kind of mountains

Answer 25

fold mountain, fault-block mountain, upwarped mountain, volcanic mountain

Question 26

consisted primarily of elevated folded sedimentary rocks

Answer 26

Fold mountains

Question 27

consist of large elevated crustal blocks bounded by faults

frequently occuring adjacent to fold mountains

Answer 27

fault-block mountain

Question 28

consist of elevated rocks to mountainous relief as a result of broad upwarping and also called as dome mountain

Answer 28

upwarped mountain

Question 29

built by the extrusion of lava and pyroclastic debris

majority ocur in ranges consituting island arcs and mid ocean ridges

Answer 29

volcanic mountain