Complex sentence: First roughly mapped from ground surveys and from air photos by the Byrd Antarctic Expedition, 1928--30, they were named by the Advisory Committee on Antarctic Names for Kenneth R. Brown, biologist with the McMurdo Station winter party of 1964.
Split into simpler sentences: First roughly mapped from ground surveys and air photos by the Byrd Antarctic Expedition, 1928-30. Named by Advisory Committee on Antarctic Names (US-ACAN) for Kenneth R. Brown, biologist with the McMurdo Station winter party of 1964.