Detailed analysis of a proven placer deposit that should determine: (1) the volumetric measurements of both overburden and gravel; (2) the estimation of the gold or other mineral contents; (3) the average value of the area in pence, cents, carats, or other unit per unit of volume; and (4) all possible information regarding the nature of the overburden and gravel--i.e., whether it is clayey, free wash, etc.--as well as of the bedrock.