leptynitic

English

Etymology

from French leptynite from Greek λεπτός (leptós) + -ic

Pronunciation

IPA^(key): /ˌlɛp.təˈnɪt.ɪk/

Adverb

leptynitic (comparative more leptynitic, superlative most leptynitic)

1. Refers to a fine-grained, typically light-colored metamorphic rock primarily composed of quartz and feldspar, often associated with high-grade metamorphic processes.
   • 1845 October – 1846 April, M.P. Schimper, “On some facts dependent on the Erratic Phenomena of Scandinavia.”, in THE EDINBURGH NEW PHILOSOPHICAL JOURNAL EXHIBITING a view of the PROGRESSIVE DISCOVERIES AND IMPROVEMENTS in the SCIENCES AND THE ARTS., volume XL, pages 241-242:

     I have found the same regularity in the striation on the transition slate of the shores of Mjosen lake; on the leptynitic gneiss of the valley of Guldbrandsdalen, where I have, at the same time, seen exceedingly well characterised moraines; …

   • 1996 August 26 – September 2, The Origin of Granites and Related Rocks (U.S. Geological Survey Circular; 1129), U.S. Geological Survey:

     Leptynitic garnet-biotite gneisses in the central and northern part of the Neoproterozoic Kerala Khondalite Belt KKB in southern India were regarded as the main source rocks for garnet-bearing leucogranites (Braun and Raith, 1994).

   • 2021, Dr. P. J. Ratnakar, Dr. SS. Asadi, GEOCHEMISTRY EVALUATION ON PART OF EASTERN GHATS, Lulu Publication, →ISBN, page 12:

     This leptnitic mound is semi-weathered and the nature of the weathering is unlike to that of the die khondalite bodies.