Fichas
Depositional Environments
Fichas del conjunto (12)
- 1Lacustrine faciesEnv.: Lake environment
Sed. Expected: Fine grained sediments
Structures: Thinly laminated
Fossils: Fresh water and terrestrial fossils (clams, insects, leaves, fish) - 2Glacial faciesEnv: Moving masses of ice
Sed. Expected: Till (poorly-sorted, coarse-grained, non-bedded)
Outwash (moderately well sorted, finer-grained, bedded)
Fossils: Rare? - 3Desert FaciesEnv: Sand dunes
Sed. Expected: Sand-sized grains
Structures: asymmetrical ripples
Fossils: Rare (tracks) - 4Fluvial faciesEnv: Rivers/streams/floodplains
Sed. Expected:
River = conglomerate and/or sandstone.
Floodplain = shale and sometimes coal.
Structures:
River = cross bedding, assymetrical ripples, graded bedding
Floodplain = Horizontal bedding, graded bedding, mudcracks.
Fossils:
River = logs or clams
Floodplains = palosols (old soil) or plant fossils - 5Delta faciesEnv: Marine and nonmarine (fresh water mixes with salt-water)
Sed. Expected: Sandstone, siltstone, shale, some coal
Structures: topset and foreset and bottomset beds ===\\___
Fossils: Mix of plant and animal - 6Beach faciesEnv:
Sed. Expected: Sandstone
Structures: Symmetrical ripples
Fossils: shells and busted shells to get fosforlifous limestone - 7Salt flat faciesEnv: flat area next to saltwater bodies
Sed. Expected: Rocksalt and rock gypsum
Structures: mudcracks
Fossils: none - 8Continental shelf faciesEnv: Extension of continental crust undersea level
Sed. Expected: Sandstone, siltstone, shale
Structure: nearshore shelf > middle shelf > outer shelf
Fossils: body fossils common and trace fossils - 9Corbonate platform faciesEnv: Bank of carbonate sediments. Warm, shallow water (islands)
Fossils: Fossforlifiours limestone and oolitic limestone - 10Reef faciesEnv: Warm, shallow water
fossforlifours limestone.
Also corals and other organisms - 11Slope faciesEnv: Steep portion of seafloor (edge of continent)
Structures: Graded bedding and flute casts (from sediment slides)
Fossils: sea life - 12Deep basinal faciesEnv: Deep ocean
Sed. Expected: Shale, chalk, chert
Fossils: sea life