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 Kansas Geological Survey Open-file Report 2003-32 |
Facies (1) Clotted Algal Boundstone
(Non-reservoir)
#23 Batman 2515.5'
Muddy, peloid-rich mottled (thrombolitic) to wavy laminated clotted algal lithology. Other clotted forms (Renalcis?) are also present. Thrombolite-leopard rock texture is typically muddy with some grains. Matrix is tightly bound anhedral, euhedral, and polyhedral dolomite (< 0.5 mm) with peloidal cement. Commonly contains sheet-like vuggy and fenestral porosity and poor intercrystalline porosity. Most thrombolitic boundstones were probably deposited in subtidal environments; fenestral porosity indicates at least local subaerial exposure. Fenestral pores are typically separated by tight matrix resulting in poor permeability.
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Last updated June 2003
http://www.kgs.ku.edu/PRS/publication/2003/ofr2003-32/P3-04-3.html