Here's a short little history on Gould. The nobel prizes are announced in the fall every year, starting in early October. He married Mary Newton in 1900. They had one child, Eileen. Sedimentary rocks can be used for a number of things.
Sedimentary rocks form layers or stratifications.
Each layer is layed down during a certain time period, so sedimentary rocks can be used to tell the geological record of an area. Scientists can tell when an organism lived through which layers its fossils are in. It's almost like looking back in time, pretty neat. Sedimentary rocks can also be quite beautiful. Take a look at this picture .