Porphyritic

Porphyritic tuffs and massive limestone compose the western chain of the Andes above Lima, while in the Oroya Valley we find carbonaceous sandstones.

Tom Swift and His Big Tunnel, or, the Hidden City of the Andes Victor [pseud.] Appleton

A Porphyritic sienite cropped out at the head of the first swamp, about a mile from our last camp.

Journal of an Overland Expedition in Australia : from Moreton Bay to Port Essington, a distance of upwards of 3000 miles, during the years 1844-1845 Ludwig Leichhardt 1830

Porphyritic breccias which envelope the quartzose porphyries. (b) Zechstein or Alpine limestone with marly, bituminous slate, fetid limestone and variegated gypsum

Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 Alexander von Humboldt 1814

Porphyritic diorite and altered sedimentary rocks are present on the claims.

The Earth Times Online Newspaper 2010

Porphyritic diorite and altered sedimentary rocks are present on the claims.

The Earth Times Online Newspaper 2010

Porphyritic breccias which envelope the quartzose porphyries. (b) Zechstein or Alpine limestone with marly, bituminous slate, fetid limestone and variegated gypsum (Productus aculeatus). (c) Variegated sandstone (bunter sandstein) with frequent beds of limestone; false oolites; the upper beds are of variegated marl, often muriatiferous (red marl, salzthon) with hydrated gypsum and fetid limestone.

Travels to the Equinoctial Regions of America 1851