They looks to be some nice detail hiding under the baked on soil some light cleaning would reveal more details for a ID. I would start with a tooth brush cut down...dry.
The other coin is a CONSTANTIUS II (DN CONSTAN-TIVS PF AVG) CENTENIONALIS (AD 348-354) of A Spearing Horseman (FEL TEMP REPARATIO) with his shield lying on ground and a Mint mark looking like LVG (Lyons).