ERRATA (WORKBOOK 1:
GEOMORPHOLOGY)

Oceanic crust thickness average 8km

Continental crust average thickness 35km.

Asthenosphere extend upto 700km.

The below given figure
thickness of various layers

Around 200 million years ago there was first
drifting in Pangaea to form 2 large continental
blocks namely Laurasia and Gondwanaland.

It is festoons instead of fastoons.

Paleomagnetic evidence has been mentioned
by Wegner but other studies.

Eperiogenetic instead of Epriogenic

The subducted plate, after reaching asthenosphere,
is melted and thus magma is formed.
should
INTERNAL STRUCTURE OF EARTH
be
used
for
CONTINENTAL DRIFT THEORY
VULCANISM

Intermontane Plateau

Its Erosional plateau instead of dissected plateau.

Shallow focus earthquake: Their depth extends up
to 70 km from sea level. High magnitude shallow
foci earthquake are the most dangerous.

Intermediate focus earthquake: The depth of
their foci extends from 70 km to 300 km.

Deep focus earthquake: The depth of their foci
extends beyond 3000 km.

It is Hercynian instead of Herchenian in
mountain building period.
PLATEAU
EARTHQUAKE
MOUNTAIN