The volcanic layer is a sill and is younger than either sedimentary layer. The volcanic layer is a sill and is older than the overlying sedimentary layer. Walther s law states that the same facies following one another in a conformable vertical sequence will also replace one another laterally. A sharp contact between two sediment layers results from a gradual change in depositional conditions. A crystal contains 1000 atoms of 238 U and 7000 atoms of 206 Pb.
Population size is limited by competition for scarce resources.
Acquired characteristics can be passed on to offspring. Crossing red flower and white flower garden peas always produces white flower garden peas. Yamaha organs Bonus questions 1.