| OCR Text |
Show 57 formation, tered the are old that so diagenetic changes may original components. matrix, silica cement, and The presence of fine authigenic the material has been altered. interpretations that greatly Ii'J.cas, clays. negate any environmental the basis of mineral on al is evidence that ca rbona te This may be made can have composi tion. SEDIHENTARY STRUCTURES Cross stratification and other is in the Hineral Fork Formation, rare The most prevalent bedding stones. bedd.Lng Nevertheless, , some even type is in the lenticular sand horizontal, continuous stra. ta and cross structure primary sedimentary ripple marks were found, and. they should be discuss. In the I-rineral Fork Formation, very ified to the extent that the All of the cross west is measureable. found in lenticular sandstones. recorded (in about were were that the average 4,000 corrected for feet of measured dip of the transport direction was formation, to the north (see figure 17). The tne are cross strat was and after these they showed and foresets are stratification Seven measurement section) axes few uni'i;s only trarport deformation tha." simple rotation reason direction on an was computed using the assumption that the Mineral Fork Formation has a.xis p3.ra.llel to strike. to believe that the situation has been There 1s no nearly that simple. 'rherefore, the suggested transport, direction may mean.ing. undergone not carry much |
