Ripple Laminated Sandstone

Sandy mudstone jtrpms is reddish brown to brownish red massive silty to sandy mudstone and siltstone which are bioturbated ripple cross laminated and interbedded with lenticular sandstone.

Ripple laminated sandstone.

On both outcrops the sandstones are horizontally laminated wavy and ripple cross laminated with prominent load casts where sandstone over shale contacts are exposed fig. Defining ripple cross laminae and asymmetric ripples. The down current slope is the angle of repose which depends on the shape of the sediment these commonly form in fluvial and aeolian depositional environments and are a. The ripple laminated sandstone facies compose of fine very fine grained sandstone that are well sorted with rounded grains.

The formation is widely distributed in jebel akhdar where glennie et al. Mixed flat ripple laminated mudstones mudflat interlaminated clay and thin pebbly sandstone point bar and claystone facies floodplain. Geologic unit mapped in new jersey. In geology lamination is a small scale sequence of fine layers laminae.

D coarse tongues of avalanche grainflow strata stand out from the enclosing wind ripple laminated sandstones viewed in planform looking down on dune foresets miocene shuwaihat formation abu dhabi uae. Lenticular cross stratified sandstone tabular ripple laminated sandstones and inclined heterolithic strata fluvial channel tidally influenced channel. 1974 divided it into three units. Asymmetrical forms dominant and they are commonly bioturbated.

Thicknesses ranges from 5 15cm mostly associated with parallel lamination sl and mudstones fm fig 3e. Current ripple marks unidirectional ripples or asymmetrical ripple marks are asymmetrical in profile with a gentle up current slope and a steeper down current slope. C airfall lamination picked out as thin pale colored laminae draping wind ripple laminated sandstone navajo sandstone jurassic utah usa. The formation about 1 000 m 3 280 ft thick consists mostly of diamictite with exotic elements in laminated sandstone and shale.

The lower unit about 200 300 m 656 984 ft thick is composed of unsorted argillaceous silty. To southwest where similar lithologic units also occur they have not been mapped separately but have been included in undivided unit jtrp. Results of form indices calculated for pebbles indicate that the mean coefficient of flatness ranges from 32 74 to 49 53 the mean sphericity ranges from 0 532 to.