GLOSSARY – L
by: Charles O’Dale
Fused silica glass SiO2. Lechatelierite has three different origins: Meteorite impacts, volcanism and lightning strikes (fulgurites). See Libyan desert glass.
LITHIC (impact) breccia
Polymictic impact breccia that contains shocked and unshocked clasts in a clastic matrix but lacks cogenetic melt particles.
Of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples or with low magnification microscopy, such as colour, texture, grain size, or composition.