Consult the figure below.A dike is a(n)____________.
A) sheet-like intrusion that lies parallel to surrounding layers of sedimentary rock
B) cooled layer of lava
C) intrusion formed within the magma chamber of a volcano
D) sheet-like intrusion that cuts across preexisting layers

Question

Consult the figure below.A dike is a(n)____________. 
A) sheet-like intrusion that lies parallel to surrounding layers of sedimentary rock 
B) cooled layer of lava 
C) intrusion formed within the magma chamber of a volcano 
D) sheet-like intrusion that cuts across preexisting layers

Quizplus · Accepted Answer

A dike is a sheet-like intrusion that cuts across preexisting layers of rock, as can be seen in the figure provided. This distinguishes it from a sill, which is a sheet-like intrusion that lies parallel to surrounding layers of sedimentary rock (option A). A cooled layer of lava would be considered a volcanic rock, but may not necessarily be a dike (option B). Although a dike can be associated with a volcano, it is not formed within the magma chamber of a volcano (option C).

Consult the Figure Below.A Dike Is A(n)____________