00006 - Rare 26.7g Impact Melt Breccia IMB Polished Section Chondrite Meteorite Chelonioids Walker to mark is contributions

Walker to mark is contributions as a vertebrate paleontologist at the natural history museum of London (BMNH) and is generosity to uninitiated student and to the famous alike

• Wolfcamp of Mexico (1)

Small and rare feldspar grains show undulatory extinction

Precious tooth of Squalicorax pristodontus (Crow Shark) from a new phosphate location in the Atlas mountains (Morocco)

coarse channel fill

00006 - Rare 26.7g Impact Melt Breccia IMB Polished Section Chondrite Meteorite Chelonioids Walker to mark is contributionsImpact melt breccias are the result of a major shock between asteroids and parent bodies. They can be of a chondritic or an achondritic source, they range from simple shock veins up to complete melting of the rock source (over 20 GPa). The authenticity of this specimen is guaranteed by the geologist Juan Avils Poblador, member of International Meteorite Collectors Association (IMCA 5681).