21471 - NWA Unclassified Chondrite Meteorite H Type 26.2g Polished Section Megistaspidella triangularis It is the gravel -

It is the gravel - sandy sediment still strongly adhered and cemented to its surface

filter-feeding appendage of Aegirocassis is considerably more complex and sophisticated than that of Tamisiocaris and may herald a shift in the Early Ordovician to large-scale filter feeding in the oceans

Eurypholis

Van Roy et al

Scanning electron microscopy (backscattered electron mode) images showing the abundance of albite plagioclase and the presence of euhedral amphibole crystals

21471 - NWA Unclassified Chondrite Meteorite H Type 26.2g Polished Section Megistaspidella triangularis It is the gravel -The authenticity of this specimen is guaranteed by the geologist Juan Avils Poblador, member of International Meteorite Collectors Association (IMCA 5681).