The upper rocks in the muav limestone are about 505 million years old. the lower rocks in the redwall limestone are about 340 million years old. which could explain this gap? the trilobites became extinct after the bright angel shale period. a. the earth's climate conditions prevented the formation of new limestones during that gap of time. b. either no deposition occurred or it was removed by erosion. c. the rock layers were subducted beneath the crust during that gap in time. d.

the crusades are one of the most significant events in the history of europe and the middle east.   they were a series of religious wars carried out by christian crusaders from europe during the timeframe of the middle ages.   beginning in 1095 ce, the crusades saw european knights and noblemen travel to the middle east in an attempt to capture the holy land away from muslim people that had controlled the region for the previous centuries.   the term crusade means ‘cross’.   therefore, the europeans that became crusaders viewed themselves as ‘taking up the cross’.   in fact, many of the crusaders wore crosses on their clothing and armor as they made their pilgrimage to the holy land.

explanation:

when in doubt choose c

it's what my teacher told my class when we were going into psats