21481 - NWA Unclassified Chondrite Meteorite L Type 10.4g Polished Section With Partial Fusion Crust Sedenhorstia Semi-quantitative EDS X-ray microanalysis was

Semi-quantitative EDS X-ray microanalysis was performed using EDS spot analysis with acquisition time 60s and maximum process time to achieve best resolution of peaks in spectra

They include some of the most primitive known meteorites

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

Trilobita - Agnostida - Ptychagnostidae

This vertebra has been stabilized on its surface by Paraloid B-72 to ensure its stability and consistency

21481 - NWA Unclassified Chondrite Meteorite L Type 10.4g Polished Section With Partial Fusion Crust Sedenhorstia Semi-quantitative EDS X-ray microanalysis wasThe authenticity of this specimen is guaranteed by the geologist Juan Avils Poblador, member of International Meteorite Collectors Association (IMCA 5681).