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<br />TABLE 6
<br />LITHOIAGIC DESCRIPTIONS FOR THE REFUSE DISPOSAL AREA
<br />STATION NUhIDER
<br />1. SANDSTONE: buff, very fine grained, moderately sell sorted,
<br />subangular; feldspathic, slightly limonitic and calcareous, micaceous;
<br />hard and conq~etent; interbedded with thinly laminated mudstone and
<br />siltstone, occasional ripple laminations; beddirg abruptly thins to
<br />south, appears to be channel margin; beds locally dip toward channel
<br />center; poorly defined vertically discontinuous joint systems, joints
<br />spaced 2-3' apart.
<br />2. SANDSTCk1E: buff, fine to medium grained, moderately well sorted, 1-2'
<br />bedding.
<br />3. SANDSTONE: light tan to white, fine to mediian grained, well-sorted,
<br />subrounded, feldspathic; porosity and permeability poor due to
<br />alteration of feldspars to clay; trough cross-stratified with
<br />individual sets 0.5'-5' thick, basal scours form parting surface where
<br />weathered, axial trend of troughs N30E; frequent soft sediment slump
<br />deformation structures; generally resistant, jointing vague and
<br />infrequent.
<br />4. COAL: dull and dirty with carbonaceous shale, 1.8' thick; overlain by
<br />lenticular thin (2') very fine grained sandstone and mudstone.
<br />MU4STONE: brown, argillaceous, moderately hard, non-fissile, irregular
<br />blocky fracture; upper 6" weathered, soft and sticky with clay.
<br />5. SANDSTONE: buff, fine to medium grained, well-sorted, feldspathic to
<br />arkosic, friable where weathered; resistant, forming ledges; trough
<br />cross-stratified; weakly developed joint system, major joints spaced
<br />5-10' apart and have undulatory dips, lesser developed vertically
<br />discontinuous set of same trend with 1' spacing.
<br />6. SANDSTONE: light reddish-brown, fine to medium grained, rmderately
<br />well-sorted; bedrock mostly covered with float, occasional massive
<br />outcrops; no definite contact but coarse sediments daninant over fine-
<br />grained lithologies from this part of the section up; mapped as
<br />Raton/Poison Canyon Fm. contact.
<br />7. SANDSTONE: light tan, fine to very coarse grained, dominantly medium
<br />to coarse grained; poor to fair sorting, subangular, arkosic; poor
<br />porosity and permeability; very lenticular massive beds 3-6' thick
<br />with irregular scour bases; interbedded with brown very fine grained
<br />sandstone and siltstone with occasional plant casts.
<br />8. COAL: same as station 4; overlain by buff, very fine to fine grained
<br />sandstone, regularly spaced joints 2-3' apart.
<br />9. SANDSTONE: buff, fine to coarse grained, medium grains daninant,
<br />subangular to subround, feldspathic, poor outcrop.
<br />10. Poison Canyon ftn with thin colluvial cover.
<br />11. SURFICIAL: 15' high flat-topped terrace inferred to be colluvial
<br />material, possibly bedrock with thick colluvial veneer; banks reveal
<br />unsorted mixture of light brown slightly calcareous to calcareous
<br />sandy soil with angular cobble to boulder size sandstone clasts; east
<br />drainage cuts terrace, possibly fan deposit from drainage. '
<br />2.04-14
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