protolithic

pro·to·lith·ic

 (prō′tə-lĭth′ĭk)
adj.
Of, relating to, or characteristic of the very beginning of the Stone Age; Eolithic.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

protolithic

(ˌprəʊtəʊˈlɪθɪk)
adj
1. (Historical Terms) of or referring to the earliest Stone Age
2. (Archaeology) of or referring to the earliest Stone Age
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive ?
In the study area high deformed zone characterized by grain size reduction and recrystallization of protolithic grain, relict porphyroclast frequency decreased and finally increased foliation volume percentage respect to the whole of the rock unit.
Sometimes, pollution is observed by high-relief minerals associated with plagioclase, quartz, and opaque minerals; all of these minerals are derived from protolithic (rhyolite) that presents three clays types: acicular, not acicular, and granular with a high hardness from silica.
At early 1980 when purified and concentrated different races of grippe viruses to obtain polyvalent anti-grippe vaccines we met with impossibility to release influenza's virus from protolithic activity.
Analysis of purified preparations of influenza virus showed that ultracentrifugation does not release influenza's virus from protolithic activity and in saccharose's gradient (15-60%) it distinctly got into several isoforms (Table 1).