Geology Consisting of broken rock, coal, or ore moved from its place of origin.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "fragmental" in a sentence
"Deimos has a smooth surface due to a blanket of fragmental rock or regolith, except for the most recent impact craters."
"Her fragmental ideas were swept tidily away by his answer."
"According to field evidence, volcanic activity occurred along the Zapopan fault zone in the north, forming La Higuera, El Mexico and La Campana volcanoes, thus filling the Santiago-Verde channel with thick lava flows interbedded with explosive fragmental material."