orthochem

orthochem

[′ȯr·thə‚kem]
(geochemistry)
A precipitate formed within a depositional basin or within the sediment itself by direct chemical action.
References in periodicals archive ?
These microfacies have been studied on the basis of orthochem and allochem elements, their percentages, and their texture in the stratigraphy section [19].
5: Distribution charts of Orthochem and Allochems in Sarvestan and Sandra Sections Sarvestan section Sadra Section Grainstone 45% 67% Packstone 0% 1% Wackstone 9% 12% Mudstone 46% 20% Bioclast 75% 77% Pellet 16% 14% Interaclast 8% 8% Extraclast 1% 1% Note: Table made from pie chart.