US E&P major, Marathon Oil Corp, yesterday, recorded a 54.5% dip in fourth quarter's adjusted profit, slipping over weak oil and gas prices. The firm's adjusted income dropped to $55 million from $121 million, a year earlier. Marathon's US production climbed to 328,000 barrels of oil equivalent per day (boe/d) from 306,000 boe/d for the same quarter last year.