1995/01/01 by Alexander R. McBirney, Robert H. Hunter · 1 citation
Earth and Planetary Sciences · #Geochemistry #Geological and Geochemical Analysis #Geology #Geology and Paleoclimatology Research #Intrusion #Layered intrusion #Linguistics #Paleontology and Stratigraphy of Fossils #Petrography #Petrology #Philosophy #Terminology
paper · doi:10.1086/629727
openalex publication_date 1995/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/26
The cumulate terminology outlined by Wager and coworkers provided a logical system for describing the textures of the rocks of layered intrusions, but recent work shows that this model fails to accommodate all the processes responsible for the petrographic features of coarse-grained rocks. Textures of "adcumulates" and "orthocumulates" in the Skaergaard Intrusion cannot be correlated with concentrations of incompatible elements representing "trapped liquid." Compaction and open-system percolative processes have altered their textures, modes, and even bulk compositions. Although a rock may be a cumulate, in the absence of other evidence, it can be misleading to refer to it in terms of the cumulate nomenclature.