ESCI 5

distal- deposited a distance from source

high energy environment large and dense rocks can settle here, poorly sorted

Rock type - conglomerate when pebbles rounded (travelled further) or breccia when angular (has not travelled far)

• Well sorted further from source
• low energy environment – fine light particles can settle here eg deep marine, still lake

-sandstone,siltstone, limestone (öolitic, mictrite)

• features preserved in sed. rocks produced by physical biological, chemical processes during
• deposition. - may provide new info on dep. environment

• symmetrical means two way force (tide in and out)
• -asymmetrical means one way force (river, wind

poorly sorted, conglomerate of breccia – heterogenous composition – Till if not consolidated, tillite if a rock

ephemeral stream ie. not constant flowing water from mountains – sandstone and conglomerate, slightly better

stream – mix of sandstones (channel) and mudstones (floodplain)

laminated siltstones, mudstones if seasonally dry, continuous flat beds – preservation of fossils

• – wind carries finest particles – fine sandstones, well rouded, quartz, large scale
• trough crossbeds

very heterogenous (sandstone, mudstones, coal limestones)

limestones, shale, chalk