Field Notebook: WY, SD 1955
Page 87
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Transcription
Fall River-Lakota contact. Seen at A, B, D, and the Carlie Mine road cut. At B, considerable, +15' shale between chert to Fe specked var. clstn and the 1st Fall River SS. At A, a thin grey SS with plant frags is at base Fall River & sits on light grey clayey silts fine, then comes var zone. At D. a good break from grey,carb specked, silty clstn to light grey then var yell. + red. Fe specked clstn. At the Carlie Mine the contact zone very atypical and good break in lith. not evident. Here there is much chub. meltae, including liq. sh. in the interval between the 1st Fall River SS and highest Lakota. Should get section of this. Fuson-Lakota unit: In this area the Lakota is consistently sandy & clayc. A lower massive clayc SS is commonly a cliff former but passes locally, in part, into uncousd. grevelly sand. Above it is locally (viz Black Gulch & Carlie mine) a clstn interval with some SS layers, then an upper massive SS. (Izter#- 43