As the lava cools, or the sedimentary particles become chemically bonded together, these magnetic domains in the rock are frozen in position, and show the direction of the earth's field at the time the rock solidified.
(the sedimentary particles; become chemically bonded together; ) (these magnetic domains in the rock; are frozen; in position) (these magnetic domains in the rock; show; the direction of the earth's field; T:at the time) (the rock; solidified; T:the time)
the sedimentary particles these magnetic domains in the rock these magnetic domains in the rock the rock
become chemically bonded together are frozen show solidified
in position
the direction of the earth's field T:at the time
T:the time