Unconformities occur when
younger rock is placed on top of older rock
igneous structures cut across
eroded surfaces are covered by younger rock
an entire sedimentary bed is deposited at the same time

this would be a math

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles