In thin sections the AMB 1 facies display a packstone depositional fabric in which the bioclstic components are dominated by the fusulinid forams (24%), brachiopod (14%), bryozoan (10%), bivalve (1%) and echinoderm 1%.
Under the microscope the AMB 2 facies show a Wackstone to Packstone depositional fabric.
Under thin sections the AMB 4 facies displays lime mudstone depositional fabric with a dominant allomicritic matrix that ranges in abundance from 60 to 90 % with an average of 75 %.
The rocks were classified in the field using a hand lens and their depositional fabric
were described .
This is particular true where the depositional fabric
of the horizon slice is poorly imaged or there is low impedance contrast between rock layers.
Furthermore bathymetric and paleogeographic constraints were also established roughly on basis of limited paleontological information without focusing depositional fabric
and energy conditions.
The dominance of lime mud within the depositional fabric
is indicative of low energy conditions as agitated water does not allow settling of lime mud.
The process of conversion varies from partial to complete obliteration of original depositional fabric
Keywords: Microfacies; Lockhart Limestone; Diagenetic fabric; Depositional fabric.
The allochemical constituents are exclusively skeletal fragments displaying Wacke- Packstone depositional fabric according to Dunham (1962) and poorly washed biomicrite according to Folk (1959).
The microfacies is dominated by mud-wackestone with appreciable amount of lime mud within the depositional fabric
and is indicative of low energy conditions, the only condition in which mud could settle down.