PERMFILE40443

• Permit No: C1981053
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: APPLICATION
• Media Type: D
• Archive: No

• lowc;r r,~rber consists of thin sandstone beds witfx interbedded shale and
comprises a transitiocial sequence with the h7ancos Shale below. The
Point Lookout Formation has an average local thickness of 400 feet.
The Marcos Shale, which is exposed approximately four msles
North of the Blue Flame Coal Cline, if of marine origin and composed of
dark gray to black shale and silty to finely sandy shale with small
anruunts of dark gray argillaceous limestone in lenses. The P.fancos hale
has an average local thickness of 2000 feet.
The bedding of the above sedvnentary rocks dips 2° to 11° in a
southerly dirrx lion, flattening to the South.
STktATIGktAPkIY
The Hesperus area, located on the Northwestern flank of the
San Juan Gasin, contains rocks of Quaternary and Cretaceous age. The
Quatr:rnary sediments ax•e confined to the valley bottoms and in
particular the La Plata Liver valley along the Castern }r~rtion of the
ax•ea. These deposits are primarily poorly consolidated gravels.
The Cretaceous tracks exposed in the project area consist of
Marcos shale, the coal bearing Mesa Verde Group, and the Lewis shale.
The Marcos and Lewis shales are of marine origin and tl~e sediments of
the Mesa Vex•de Group ar•e of transitional to no~unarine origin. The
l:enefee formation, the middle member of the t.tesa Verde group, is the
primary coal bearing formation.
-L -
L