1.   ICE HINTS AT WATER ON MARS Geologic structures associated with ice on Earth have been spotted on the first close-up images of Mars.

2.   To find blind faults, Shaw said, scientists must identify geologic structures underground, a task with which the oil and gas industry is quite familiar.

3.   Oswald believes that Windsor Castle sits atop a geologic structure that looks perfect for oil.

4.   Oswald, a retired Chevron Corp. geologist believes Windsor Castle sits atop a geologic structure that looks perfect for oil.