Assertion: archipelago's island | /r/HasProperty | roca oneal
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text: San Benedicto, 40 miles (64 km) north of Socorro, and Clarión, 250 miles (400 km) west of Socorro, are the two other large islands; small islands include Roca Partida, 60 miles (100 km) west of Socorro, and Roca Oneal, just off the northwestern coast of Socorro.