Question 1: These have a
very low ________,
which is why they 'flood' rather than form taller volcanoes.
Question 3: Flood basalts have erupted at random intervals throughout geological history and are clear evidence
that the ________ undergoes periods
of enhanced activity rather than being in a uniform steady
Question 4: Flood basalts have tholeiite and ________ compositions (according to the
classification of Yoder and Tilley).
Question 5: The thickness can vary from 2000
metres (Deccan Traps) to 12,000 m ( ________).
Question 6: To obtain a partial fusion as
large as that of the traps, expelling huge quantities of lava, it
is necessary to have a large ________
Question 7: A flood basalt or trap basalt
is the result of a giant volcanic eruption
or series of eruptions that coats large stretches of
land or the ocean floor with ________ lava.
Question 9: Degassing was easy (magma maintained at a
high temperature and
more fluid in a chamber of a
size such that confining ________ did not confine gases to the melt