Circumgranular cracking

Micritic fabric, meniscus cements, circumgranular cracking, crystallaria, alveolar textures, grain dissolution... 

Calcite cements associated with these concretions are dominantly micritic and exhibit circumgranular cracking, alveolar, micrite-spar and meniscus microtextures. Radial spar microtexture is present locally, characterized by bladed radial spar formed around a micritic nucleus (Fig. 1OD). 

Type 2 tabular units lack original sedimentary structures and are often associated with reddened clays and clayey sands from overbank fine (OF), palaeosol (P) and interdune (ID) deposits (Table 1 Fig. 6). Micritic calcite is the main cement, and micrite-spar textures, grain dissolution, alveolar structures, circumgranular cracking and meniscus cement are common. Type 2 tabular units are subdivided by outcrop morphology into massive, platy, wavy bedded, fractured and laminar types. 

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