A Playa Lake Usuallycontains Laminated Mudstone

Laminate with horizontal bedding and vertical trace fossils.

A playa lake usuallycontains laminated mudstone.

Sedimentary successions are interpreted as having accumulated in a playa lake complex. B current rippled cross. Red and green well laminated mudstone with very thin cm fine to medium grained sandstone layers. Ripple and horizontally laminated mudstone clayey siltstone and very fine to fine grained sandstone in beds 0 1 to 0 5 m thick.

Fine grained well sorted mudstone to packstone. A laminated siltstone and mudstone. Deposits include three sedimentary facies. Upper regressive lake margin playa lake and mudflat deposits are light to dark gray silty mudstone to argillitic siltstone or very fine grained sandstone mostly thick bedded to massive with desiccation cracks intraformational breccias faint wavy laminations burrows euhedral pyrite grains and dolomite or calcite specks.

One with mudstone and sandstone in roughly equal proportions fl a the other with a sandstone mudstone ratio of about 5 1 fl b fig. The facies is divided into two subfacies that are gradational. A laminated siltstone and mudstone. Sedimentary successions are interpreted as having accumulated in a playa lake complex.

Comprised of 20 to 70 cm thick thinning and fining upward sequences. Upper regressive lake margin playa lake and mudflat deposits are light to dark gray silty mudstone to argillitic siltstone or very fine grained sandstone mostly thick bedded to massive with desiccation cracks intraformational breccias faint wavy laminations burrows euhedral pyrite grains and dolomite or calcite specks. The playa lake depositional model for the three forks formation beatriz garcia fresca. Deposition in distal terminal splay and shallow ephemeral playa lakes.

Deposits include three sedimentary facies. Skeletal and oolitic grindstone cross bedding and ripple marks. Een mudstone stone laminated tone mudstone d d stone trix d b reccia red e 5. Playa lake depositional environment modern hardie et al.

Rare bioturbation palaeosols. B current rippled cross laminated very. Alluvial fan glacier lake lacustrine meandering stream fluvial desert eolian playa. A moderately diverse arthropod icnofauna occurs in permian ephemeral lacustrine deposits of the paganzo basin that crop out at bordo atravesado cuesta de miranda western argentina.