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COCORP (COnsortium for COntinental Reflection Profiling) A project operated from Cornell University, USA, whose objects are to map the basement rocks of the USA and to focus on specific geologic problems. In areas of interest the practice is to run long profiles, typically 50–200 km, and to record data to 18–20 seconds two-way travel time (one second of two-way travel time is equivalent to about 3 km of crystalline basement).