Ocean Drilling (1 gen 1968 anni – 1 gen 2000 anni)
Descrizione:
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
Aggiunto al nastro di tempo:
Data:
1 gen 1968 anni
1 gen 2000 anni
~ 32 years