Ocean Drilling (1 ene 1968 año – 1 ene 2000 año)
Descripción:
A group of oceanographic institutions and U.S. Nat'l Science Foundation created a prog of ocean drilling. oceanographers had been able to collect sediment and samples of rocks from the seafloor starting from the Challenger Expedition
Añadido al timeline:
fecha:
1 ene 1968 año
1 ene 2000 año
~ 32 years