(1) Pertaining to or containing aluminum or alum
(1) Plagioclase is commonly variably replaced by aluminous prehnite, which indicates temperatures below 400°C.
(2) It likely exists as a hydrothermal alteration product of aluminous materials.
(3) Import tonnage of aluminous cement is small, however levels did increase by more than 33% to 41,137 metric tons.
(4) Mafic and ultramafic rocks predominate, although a few examples of metasedimentary rocks are known, including aluminous lithologies.
(5) Associated units are sillimanite-bearing aluminous metasediments, quartzites, and arnphibolites.