The primary depositional environments of these diverse Md1 dolomites varied from microbial reefs (or buildups) to ooidal
shoal which could have aggraded to the tidal flat (Figure 1(b)).
This platform was characterized by shallow bioclastic lagoonal to ooidal
marginal marine environments with limited, cyclical shifts of the shoreline, possibly due to eustatic causes.
A Egg-shaped B Kind of limestone C Estuary ooze or sediment who am I?
In this model, inner ramp deposits comprise mainly ooidal
, peloidal and skeletal grainstones, whereas wacke- and packstones with abundant beresellid algae and Chaetetes sponges account for the mid ramp and, finally, wacke- to packstones with abundant siliceous sponge spicules and micrite buildups represent the outer ramp.
The Brevilamnulella Association, typical of ooidal
tidal shoal, and the Thebesia Association characteristic of tidal channels, as described by Brenchley & Cocks (1982), have not been identified in the East Baltic sequences.
In the lower part of the weathering profile primary ooidal
textures have been destroyed by dolomitization and small doubly terminated quartz crystals have developed through silicification.
Furthermore, these microfacies are divided into sub-microfacies including fenestral mudstone and bioclastic mudstone sub-microfacies, fenestral ooidal
packstone and peloidal packstone sub-microfacies.
2) C Oosparite; sandstone; Ooidal
to bioclastic nodular limestone grainstone; sandy with archaeocyaths channels; archaeocyathan- microbial reefs; hyolith-rich wakestone B Grey bedded limestone Fenestral, peloidal with birdseyes; algal and microbial grainstone; mats; stromatolites; ooidal
grainstone; intrapelsparrudite bioclastic wackestone to mudstone A Massive and laminated dolomicrite; pelsparite; pelsmicrite; intrapelsparite; oosparite; cryptalgal laminites Lithofacies Wotte (2009) (codes from Cremenes(1) and Fig.
Detailed laboratory study revealed the presence of 6 microfacies which are bioclastic grainstone, peloidal grainstone, ooidal
grainstone, mudstone, bioclastic mudstone and bioclastic packstone.
The identified Lithofacies are, Thick, cross bedded sandstone lithofacies (DFL-1), Interbedded shale and sandstone lithofacies (DFL-2), Carbonaceous shale and coal lithofacies (DFL-3), Laterite lithofacies (DFL-4) and identified microfacies are, Dolomite Mudstone (MDF- 1), Siliciclastic Spicules rich Bioclastic Mudstone (MDF-2), Peloidal Bioclastic Packstone Microfacies (MDF-3), Bioclastic Ooidal
Peloidal Grainstone Microfacies (MDF-4).
The microfacies of the Samana Suk Formation includes bioclastic mudstone, dolomitized mudstone, bioclastic wackestone, peloidal bioclastic wackestone, peloidal ooidal
packstone, peloidal packstone, ooidal
peloidal grainstone, intraclastic peloidal grainstone and peloidal grainstone.
These microfacies includes bioclastic grainstone microfacies, bioclastic ooidal
peloidal packstone-grainstone microfacies, Siliciclastic bioclastic wackestone microfacies and peloidal mudstone microfacies.