Yes. According to a publication of the Greene County Genealogical Society, the marriage was recorded on that date. The only other info it will give is that Mary was the dau. of Adam Shroyer and they were married by Samuel Rhoad, J. P. If you would like a copy of the record, email firstname.lastname@example.org
Marriage records are recorded in Iowa with the beginning of each county (1854 for Greene). Births and Deaths were not recorded in Iowa until 1880.