The Kalkowsky Project - Chapter IV. Case study of the Happy Spraberry oil reservoirs in NW Texas (with a micropaleontologic and biostratigraphic supplement): Collapsed molds should not be treated as a category of distorted ooids

Granier, Bruno R.C.; Kendall, Christopher G.St.C.; Vachard, Daniel

[Previous] [Next]

Figure 1: A1 to A3) Aragonite ooid cemented by Low-Mg calcite (LMC) in alkaline fresh water, followed by leaching of the cortical aragonite in acidic fresh water. B1 to B3) Aragonite gastropod shell cemented by High-Mg calcite (HMC) in marine water, followed by selective leaching of the gastropod shell aragonite in acidic fresh water, possibly due to the presence of acid from organic proteins.