The outcrop above shows generally alternating bands of gray and…  The outcrop above shows generally alternating bands of gray and white se

The outcrop above shows generally alternating bands of gray and…  The outcrop above shows generally alternating bands of gray and white sedimentary rock. The inset shows a portion of the outcrop in detail, with certain features labeled. Describe the texture and composition of the outcrop, and use your knowledge of sedimentary structures to infer the environment at the time of deposition.First observe feature A:Grain-size:  _______       [coarse/ coarse to medium/ medium/ medium to fine/ fine] Structures: _______       [cross-bedding/ mud cracks/ graded bedding/ ripple marks] Next observe feature B:Grain-size: _______     [coarse/ medium/ fine]  Now complete the following inferences:The the grain size and rounding of feature A suggest the deposition of an ________   [mature/ immature”]  in an  _________ [high/ low]  environment, while the grain size of feature B suggests a _______ [high/ low]  environment. The dominant structure of feature A suggests   ________  [constant high-energy flow/ calm low-energy environment/ gradual transition from high- to low-energy conditions/ gradual transition from low- to high-energy conditions]  , which feature B is likely a continuation of. This sequence is characteristic of ________   [debris flows/ turbidy currents/ sand dunes/ tidal flats]  . Features C and D appear to repeat the sequence of A and B, implying that  _________ [deposition occured slowly and continously/ conditions were changing throughout the period of deposition/ deposition occured all at once/ depositional events are repeated frequently] . Thus, this outcrop may have been deposited _________  [in a lake/ on an alluvial fan/ in a tidal flat/ on the continental slope/ on a delta/ on the continental shelf]  . Earth Science Science Geology GEOLOGY 101 Share QuestionEmailCopy link