 MIDLAND, Texas, May 4, 2021 PRNewswire -- Dawson Geophysical Company NASDAQ: DWSN announced today that it plans to publicly release preliminary and unaudited financial results for the quarter ended March 31, 2021, the Companys first quarter of 2021, before the market opens on Thursday, May 13, 2021. An investor conference call to review the first quarter results will be held on Thursday, May 13, 2021, at 9:00 a.m. 