Within the Main Dolomite carbonates of Poland, the most common organosedimentary structures are microbial laminites, stromatolites, and thrombolites, mostly developed in inter- to subtidal facies . The intertidal facies are chiefly composed of planar stromatolites (<50 cm [20 in.] thick) and thrombolites (20 cm[8 in.] thick). Planar stromatolites mainly contain
even laminae that consist of light (muddy)-gray and dark (organic) couplets of microsparitic dolomite and darkgray micritic dolomite (deposited in restricted lagoons and intertidal pools). They commonly contain fenestrae
filled with sulfate. Micritic organic layers contain algal
remains (Mizzia), ostracods and rare foraminifera, coated
grains, and peloids, and are built of coccoid-like organomineral
forms and microbial filaments. Oncoids and peloids
formgrainy planar stromatolites (deposited in inner
ooid shoals and tidal channels), dolomitic grainstone, and
packstone.