Grand Staircase of the RMS Titanic the "Olympic", whose B-Deck aft foyer was much smaller because of additional cabins and storage rooms. There was no reception area on the "Olympic" until the 1913 refit, which expanded the restaurant and added a reception area in emulation of "Titanic". On "Titanic" two additional en-suite staterooms were installed off of the A-Deck aft staircase, decreasing the size of the surrounding foyer in comparison to "Olympic". When Robert Ballard discovered the wreck of the "Titanic" in 1985, he found only a gaping well in the place that the Staircase had once occupied. The deck house that once formed the Boat
Geology of the Pacific Ocean . The Pacific Ocean developed from the Panthalassa, a vast global ocean, following the breakup of the supercontinent Pangaea in the Mesozoic Era, gradually forming Gondwana and Laurasia, which in turn divided. There is no firm date for when the changeover occurred, as the replacement of the sea bed is a continuous process, though reconstruction maps often change the name from Panthalassic to Pacific around the time the Atlantic Ocean began to open. The Panthalassic Ocean first opened around 750 million years ago at the breakup of Rodinia, but the oldest Pacific Ocean floor is only around 180 Ma old.