 MIDLAND, Texas, Aug 5, 2021 PRNewswire -- Dawson Geophysical Company NASDAQ: DWSN announced today that it plans to publicly release preliminary and unaudited financial results for the quarter ended June 30, 2021, the Companys second quarter of 2021, before the market opens on Thursday, August 12, 2021. An investor conference call to review the second quarter results will be held on Thursday, August 12, 2021, at 9:00 a.m. 