Mountain building, weathering, and erosion eventually expose the fossil at the surface. Sedimentary rock is the type of rock that is made of hardened sediment. Most fossils form from animals or plants that once lived in or near quiet water such as swamps, lakes, or shallow seas where sediments build up.
Plate Tectonics, that would be the answer <span />
If the semicircle is on the 29 side:
<span>2(19) + 29 + 29pi/2 = 67 + 14.5pi </span>
<span>This is because the radius is equal to 1/2 the diameter and the perimeter of a semicircle is radius*pi. The 2 19's come from the rectangle part of the garden and the other 29 comes from the side opposite the semicircle. </span>
<span>If the semicircle is on the 19 side: </span>
<span>2(29) + 19 + 19pi/2 = 77 + 9.5pi </span>
<span>You simply switch the 19 and 29 values.</span>