Laserfiche WebLink
• Z. Cameo Seam <br />The Cameo coal zone is notable for the thickness of its seams <br />and its great extent. It has been the most productive zone in the Sook <br />Cliff's coal field. The interval between the Cameo and the underlying <br />Palisade on this lease varies from 416 to 457 feet and averages 429 <br />feet. {See Typical Cross Section) The interval between the Cameo and <br />the overlying Carbonera ranges from 38 to 93 feet and averages 64 feet. - <br />This interval generally consists of thin coals and carbonaceous, laminated <br />sandy siltstones, although significant sandstones (over 10 feet thick) <br />are present in four of the existing test holes. Typically the immediate <br />and main top consists of laminated to thin bedded sandy carbonaceous <br />siltstone and silty carbonaceous sandstone. The seam, which occurs as a <br />single bed over much of the lease, appears to split toward the southeast, <br />where one to three rider seams are present. <br />One of the chief characteristics of the Cameo coal is the relatively <br />large amount of bone-coal whose ash content commonly exceeds SO percent. <br />Carbonaceous shale beds are occasionally present within the coal seam. <br />The lower foot or so commonly contains grains of windblown quartz sand, <br />especially where the lower boundary is immediately above the Rollins <br />Sandstone, from which the coal is separated on this lease by 5 to 30 <br />feet of Carbonaceous siltstone and silty sandstone, often somewhat <br />coaly. <br />Another distinctive feature of the Cameo is the presence of sandstone <br />dikes. These dikes vary from inches to several feet in thickness and <br />may intrude all or only part of the seam. They are known wherever the <br />• Cameo has been mined, but appear to be most common in the *[ount Lincoln <br />area, 1 to 2 miles north of the subject area. Tiiey are extremely rare <br />in t3~e developed por[ioii of the Foadside property immediately to tlic <br />