Thanks again for viewing and my shipping is like this, the first is usually only $4.79 and .50 cents for each additional item, unless over 60 grams, then 1.00 per item. Everyone is given the opportunity to shop for two full weeks without ever exceeding 10.00 shipping, no matter how many you win or buy over the two-week period, even earth stones! Cheers and thanks again for stopping by.
Northwest Africa 13200 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13200 Abbreviation: NWA 13200 ![]() | ||||||||||||||||||||||||||||||
Classification history: |
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 16 Feb 2020 | ||||||||||||||||||||||||||||||
Writeup![]() | Writeup from MB 109: Northwest Africa 13200 (NWA 13200) (Northwest Africa) Purchased: 2019 Mar Classification: Ordinary chondrite (L3) History: Purchased from a dealer in Morocco in March 2019. Physical characteristics: The fusion crust has a dark color. Petrography: (D. Souza , UBayr). Chondrules have an apparent diameter of around 500 µm (N = 30) making up ~80% in vol. of the meteorite. Chondrules are principally porphyritic pyroxene (PP), olivine (PO) and granular olivine-pyroxene (GOP). Radial pyroxene and are also present in smaller amounts. The matrix is composed mainly of olivine which presents undulatory extinction and pyroxenes. Metal and troilite have oxidized rims. Metal content in thin section is ~8% in volume. Geochemistry: Mineral compositions and Geochemistry: Olivine (Fa25.1±3.2 ; Cr2O3 in ferroan examples 0.1±0.07 wt.%; Fe/Mn = 54±9 ; N=13). Orthopyroxene (Fs17.8±3.6; Fe/Mn = 28±11; N = 12). Classification: Ordinary chondrite (L3, S2, W2). Specimens: 27.7g at UBayr including a thin section. S. Tutorow holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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