Sample No.:	DOM 03201
Location:	Dominion Range
Field No.:	14992
Dimensions (cm):	4.5x4.0x3.5
Weight (g):	114.635
Meteorite Type:	L3 Chondrite

   

Macroscopic Description: Kathleen McBride
The exterior has 95% shiny brown/black fusion crust. The interior matrix is brownish in color with light tan and rusty colored chondrules, and has a high metal content.

Thin Section (,2) Description: Tim McCoy

Cross-Polarized Light	Reflected Light

The section exhibits numerous large, well-defined chondrules (up to 2 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is abundant. Silicates are unequilibrated; olivines range from Fa_2-31 and pyroxenes from Fs_3-27. The meteorite is an L3 chondrite of moderate petrologic type (estimated subtype 3.6).

Macroscopic Description: Kathleen McBride
90% of the exterior has dull brown/black fusion crust with oxidation halos. The rusty black matrix has a high metal content with a few rusty chondrules. This meteorite is hard.

Thin Section (,2) Description: Tim McCoy
The section exhibits numerous small, well-defined chondrules (up to 1.5 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is extremely abundant. Silicates are unequilibrated; olivines range from Fa_8-35, with most grains Fa_19-20, and pyroxenes from Fs_8-19. The meteorite is an H3 chondrite (estimated subtype 3.8).

DOM 03219 Cross-Polarized Light	DOM 03219 Reflected Light	DOM 03219 Cross-Polarized Light

Macroscopic Description: Kathleen McBride
Exterior is completely covered with dull black fusion crust with polygonal fractures. The interior is mostly rusty with high metal and light colored chondrules stained with rust.

Thin Section (,2) Description: Tim McCoy
The section consists of abundant small (up to 1 mm) chondrules, chondrule fragments and mineral grains in a dark matrix. Metal and sulfide occur within and rimming the chondrules. Olivine ranges in composition from Fa_1-55, with a continuous range of intermediate compositions and a slight peak at Fa_0-2. A single pyroxene is Fs₁. The meteorite is a CO3 chondrite, probably of relatively low petrologic type.

DOM 03238 Cross-Polarized Light	DOM 03238 Reflected Light	DOM 03238 Reflected Light

Macroscopic Description: Tim McCoy
This small, equidimensional meteorite, measuring ~6 mm on a side, exhibits a uniform, rusty external appearance.

Thin Section (,1) Description: Tim McCoy

Reflected Light

An end cut of this meteorite with a surface area of ~5 by 6 mm was mounted as a polished thin section and examined. The meteorite consists entirely of kamacite with an average Ni concentration of ~6 wt. %. The only structure revealed by nital etching is several sets of Neumann bands. Many of these bands are subsequently distorted and heat alteration is prevalent at the edges of the section, although weathering appears to have removed any fusion crust. The meteorite is classified as an ungrouped iron, but its small size suggests that it is probably not representative of the larger mass from which it was derived.

Macroscopic Description: Kathleen McBride
The meteorite has black patches of fusion crust over 20% of its surface. The charcoal gray matrix contains white specks.

Thin Section (,2) Description: Tim McCoy
The section consists of numerous small chondrules (up to 1 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Chondrules exhibit relatively little alteration and are set in a matrix of serpentine. Olivine compositions are Fa_1-12, with a peak at Fa_0-2; a single pyroxene is Fs₁. The meteorite is a CM2 chondrite.

LAP 031022 Cross-Polarized Light	LAP 031022 Reflected Light	LAP 031022 Reflected Light

Sample No.: CMS 04021 Location: Cumulus Hills Field No.: 14615 Dimensions (cm):   5.0x3.5x2.5 Weight (g): 61.333 Meteorite Type: Mesosiderite

Macroscopic Description: Kathleen McBride
80% of the exterior is covered by thin, shiny chocolate brown fusion crust. The light gray crystalline matrix has 1-5 mm black angular inclusions, and 1-2 mm yellow and brown inclusions.

Thin Section (,4) Description: Tim McCoy

Cross-Polarized Light	Reflected Light

The section shows a groundmass of comminuted pyroxene, plagioclase, metal and sulfide with larger silicate fragments reaching 2 mm. Orthopyroxene compositions range from Fs_28-32Wo_2-3 (Fe/Mn ~30) and plagioclase is An_77-94Or_0-2. The meteorite is probably a silicate clast from a mesosiderite.

Sample No.: CMS 04044; CMS 04048 Location: Cumulus Hills Field No.: 14002; 14030 Dimensions (cm):   3.0x2.5x2.5 2.0x2.5x2.5 Weight (g): 20.20; 30.27 Meteorite Type: Ureilite

Macroscopic Description: Kathleen McBride
CMS 04044 has a fractured brown exterior. 048 has 60% dull brown/black fusion crust with some polygonal fractures and oxidation. The interiors are rusty, crystalline with fractures. 044 has evaporites present.

Thin Section (,2 ,4) Description: Tim McCoy
The meteorites are so similar that a single description suffices. The sections consist of an aggregate of large olivine and pyroxene grains up to 2 mm across. Individual olivine grains are rimmed by carbon-rich material containing traces of metal. Olivine has cores of Fa₂₃, with rims reduced to Fa₃. Pigeonite is Fs₁₉, Wo₇. The meteorites are ureilites.

CMS 04044 Cross-Polarized Light	CMS 04044 Reflected Light	CMS 04044 Cross-Polarized Light	CMS 04044 Reflected Light