6.10 Reading\" Earth History from a Sequence of Strata ACTIVITY Course/Section:

Question

6.10 Reading" Earth History from a Sequence of Strata ACTIVITY Course/Section: Date: Name about 270 million years old) esposed along Interstate Route 70 in northeastern Kansas. Describe the A. Permian strata (about2 change (purple column). paleoenvironment (pink columa), then apply it to infer the record of DESCRIPTION OF RECORD OF CHANGE HAND SAMPLE Bedding plane surface DESCRIPTION OF PALEOENVIRONMENT ROCK UNIT REPRESENTED BY THE ROCK UNIT OUTCROP 7. Tan skelotal lmestone with shells of many kinds bimodal cscilation ripple marks animal bumows, flutes fute casts, and chert. 6 Gray silty mudstone shaloj with animal burrows, fossl clams, fossil plant fragments, and ourrent ripple marks 5. Red and gray sity mudstone with raindrop impressions fossil roots, and 4. Gray sity mudstone with abundant gypsum ayers and crystais 3. Tan skeletal limestone with bimodal cross-bedding peat bog or swamp 2. Coal 1, Gray sity muitone with mudcracks and fossil fems. ·Protibly most muddy musoracks land where fens grow dy perods ? REFLECT&DISCUSE; 1611 in this way about 270 million years

Explanation / Answer

Description of rock unit Description of paleoenvironment Represented by the rock unit Record of change ocean(marine), Muddy bay/estuary, evaporating bay,peat bog/swamp,land 7.) Tan skeleton limestone with shells of many kinds ofmarine organisms, bimodal cross-bedding, oscillation ripple marks ,animal burrows, flutes, flute casts,and chert Calm ,marine waters with marine organisms. No terrestrial mud present,only shell fragments to form limestone OCEAN (marine) 6.) Gray silty mudstones (shale) with animal burrows,fossil clams,fossil plant fragments, and current ripple marks. Muddy bay with clams and plant debris. Muddy bay/ estuary 5.) Red and gray silty mudstone with rain drop impressions, fossils plant fragments,and current ripple marks Muddy lands where plants grow Land 4.) Gray silty mudstone with abundant gypsum layers and crystals Probably muddy evaporating bay, in which gypsum precipitates Evaporating bay 3.) Tan skeleton limestone with bimodal cross-bedding Shallow, calm, warm marine waters Ocean (marine) 2) Coal Peat bog or swamp Peat bog and swamp 1) Gray silty mudstone with mucracks and fossilfrems probably moist muddy land where ferns grow, mudcracks are formed in dry periods. Land

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