L/LL3 Meteorite Classification

Class Description

The classification “L/LL3” refers to a meteorite that can belong to either the L group or LL group of ordinary chondrites and is of petrologic type 3. Ordinary chondrites are known for their high abundance of chondrules and low levels of aqueous alteration. The L group has moderate-sized chondrules, while the LL group has fairly large chondrules and distinct oxygen isotope compositions. Petrologic type 3 indicates that the meteorite has abundant chondrules, minimal aqueous alteration, and certain characteristics in its mineral composition, such as monoclinic low-Ca pyroxene grains with twinning.

L/LL3 Meteorite Examples

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