Karoonda - CK4 Carbonaceous Chondrite

Karoonda is a historic witnessed CK4 Carbonaceous Chondrite fall from South Australia, which occurred near the town of Karoonda on 25 November 1930. The fall was seen as a brilliant fireball across a wide area, with detonations reported before the meteorite was recovered shortly afterwards. Karoonda is especially important because it is the type specimen for the CK group, meaning this rare Carbonaceous Chondrite classification is named after it. The Buseck Center for Meteorite Studies lists Karoonda as a Carbonaceous CK4 Chondrite fall from Australia.

Karoonda specimens are typically dark, compact, and thermally altered compared with more primitive Carbonaceous Chondrites. As a CK4 meteorite, it preserves Carbonaceous chemistry while showing clear evidence of parent-body metamorphism, with chondrules and matrix material altered by heat. Its mineralogy and texture differ from groups such as CM, CI, and CV Chondrites, giving Karoonda a distinct place within Carbonaceous meteorites. The CK group itself was formally recognised through studies of Karoonda and related material.

Studying Karoonda provides valuable insight into the diversity of Carbonaceous Chondrite parent bodies and the effects of thermal alteration on primitive solar system material. Its witnessed fall status, Australian provenance, historic importance, and role as the defining CK meteorite make it highly significant to both researchers and collectors. Each specimen represents ancient asteroid material connected to one of the most important Carbonaceous Chondrite falls in meteorite history.