Which sources would preserve the soft tissues of an early mammal? Check all that apply. amber in Russia
frozen soil in the Arctic
shale in Virginia
sandstone in the Badlands
foraminifera in the ocean
ice sheets in Greenland

answer; i believe the correct answer is (solid gold);

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.