Complex sentence: In 1940 an expedition led by engineer-geologist G.A. Chernov traveled to the coast of Khaipudyrskaya Bay (Barents Sea) to carry out a detailed geological survey and review the available information on the oil-bearing Usinsk area.
Split into simpler sentences: In 1940 an expedition led by engineer-geologist G.A. Chernov moved toward the coast of Khaipudyrskaya Bay (Barents Sea). There he carried out a detailed geological survey and reviewed the available information on the oil-bearing region Usinsk area.