Ten pieces constituting a single stone with a combined weight of 209.4 g was found by an anonymous hunter and later sold in Morocco to collector H. Strufe. A portion was submitted for analysis to the Museum für Naturkunde, Berlin, Germany (A. Greshake and M. Kurz). Northwest Africa 4020 was classified as an L/LL3, a transitional unequilibrated ordinary chondrite. This meteorite has been weakly to moderately shocked (S3/4), and has experienced heavy terrestrial oxidation (W3).
A brief review of the evidence supporting a separate L/LL parent body can be found on the Inman page. The specimen of NWA 4020 shown above is a 1.4 g partial end section.
