younging

Etymology

noun

1. (geology) The direction in which stratigraphy becomes younger, for a particular formation
   Where well preserved, the pillows show cuspate lower boundaries and lobate upper contacts, defining stratigraphic younging (Fig. 3 E). May 11, 2001, Timothy M. Kusky et al., “The Archean Dongwanzi Ophiolite Complex, North China Craton: 2.505-Billion-Year-Old Oceanic Crust and Mantle”, in Science, volume 292, number 5519, →DOI, pages 1142–1145

verb

1. present participle and gerund of young