Sample No.:	LAP 02235
Location:	LaPaz Icefield
Field No.:	15198
Dimensions (cm):	3.3x2.5x1.9
Weight (g):	31.108
Meteorite Type:	L5 Chondrite

Macroscopic Description: Kathleen McBride
The exterior of this chondrite is covered with 90% black fusion crust with oxidation haloes and fractures. The interior is a dark gray to black matrix with rusty brown patches and some metal. Some millimeter sized inclusions are visible.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan
The meteorite is an equilibrated L chondrite (Fa₂₃, Fs₂₀) of petrologic type 5. It contains prominent shock veins of finely disseminated metal and sulfide that reach up to 3mm in width. No high pressure silicate polymorphs were noted.

Macroscopic Description: Cecilia Satterwhite
The exterior of this meteorite is brown. The interior revealed a brown matrix with no obvious features.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan
The section consists dominantly of a fine-grained melt-textured matrix of olivine and pyroxene (1-10 microns) with irregular blebs of metal with rimming sulfide and fragments of mineral grains (200-300 micron grain size.) The mineral compositions are homogenous; olivine is Fa₁₈ and orthopyroxene is Fs₁₆. The meteorite is an impact melt of an H chondrite precursor.

LAP 02240 Cross-Polarized Light	LAP 02240 Plane-Polarized Light	LAP 02240 Reflected Light

Sample No.: LAP 02269; LAP 02302; LAP 02308; LAP 02348 Location: LaPaz Icefield Field No.: 15440; 15444; 15403; 15534 Dimensions (cm):   4.5x3.0x2.0 3.0x2.0x1.5 4.5x2.5x2.0 2.0x2.0x1.5 Weight (g): 24.239; 7.859; 14.145; 6.862 Meteorite Type: CM2 Chondrite

Macroscopic Description: Kathleen McBride
These CM2 chondrites have purplish black fusion crust on the surface. The interior is a black matrix with millimeter sized inclusions of various colors including white, crème, gray and black.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan
The sections consists of a few small chondrules (up to 1 mm), mineral grains and CAIs set in a black matrix; sulfide and carbonate grains are present. Olivine compositions are Fa_0-34, with a peak at Fa_0-2, and orthopyroxene is Fs₁. The matrix consists dominantly of an Fe-rich serpentine; chondrules are relatively unaltered. The meteorites are CM2 chondrites.

LAP 02269 Cross-Polarized Light	LAP 02269 Plane-Polarized Light	LAP 02302 Cross-Polarized Light	LAP 02302 Plane-Polarized Light

LAP 02308 Cross-Polarized Light	LAP 02308 Plane-Polarized Light	LAP 02348 Cross-Polarized Light	LAP 02348 Plane-Polarized Light

Macroscopic Description: Kathleen McBride
70% of the exterior is covered with rough purplish black fractured fusion crust. The interior of this carbonaceous chondrite has a black, chalky matrix with black to dark gray inclusions.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan
The section consists of a few small chondrules (up to 0.5 mm) that have been completely replaced by phyllosilicate set in an Fe-rich serpentine matrix. No isolated mineral grains or CAIs are apparent; sulfide and carbonate grains are present. Unaltered olivine or pyroxene grains of sufficient size for microprobe analyses were not found. The meteorite is a highly altered CM chondrite probably of petrologic type 1.

LAP 02277 Cross-Polarized Light	LAP 02277 Plane-Polarized Light	LAP 02277 Reflected Light

Macroscopic Description: Kathleen McBride
The exterior of 336 has a dull, brown-black fusion crust with polygonal fractures. A few areas have a shiny, frothy appearance. 349's exterior has a thick purplish patch of fusion crust. The interiors of both are dull, black, soft and friable with white, cream and tan colored chondrules. Both have an oxidation rind.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan
The sections consist of a few small chondrules (up to 0.5 mm), mineral grains and CAIs set in a black matrix; rare sulfide grains are present. Olivine compositions are Fa_0-45, with a peak at Fa_0-2. The matrix consists dominantly of an Fe-rich serpentine; chondrules are moderately altered. The meteorites are CM2 chondrites.

LAP 02336 Cross-Polarized Light	LAP 02336 Plane-Polarized Light	LAP 02349 Cross-Polarized Light	LAP 02349 Plane-Polarized Light

Macroscopic Description: Kathleen McBride
100% of the exterior is covered with dull, brown/black fusion crust with oxidation haloes. The chocolate brown interior has millimeter sized multicolored chondrules.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan
The section exhibits large (up to 2mm), well-defined, metal-rich chondrules and CAI's in a dark matrix of FeO-rich phyllosilicate. Polysynthetically twinned pyroxene is abundant. Silicates are unequilibrated; olivines range from Fa_0-5, and pyroxenes from Fs_1-3. The meteorite is probably a CR2 chondrite.

LAP 02342 Cross-Polarized Light	LAP 02342 Plane-Polarized Light	LAP 02342 Reflected Light

Macroscopic Description: Kathleen McBride
90% of the exterior surface has thick black fusion crust. The interior has a black matrix with millimeter sized light colored inclusions.

Thin Section (,2) Description: Tim McCoy, Linda Welzenbach
The section consists of an aggregate of small equant olivine and pyroxene grains up to 0.5 mm across. Individual olivine grains are rimmed by carbon-rich material containing traces of metal. Olivines have cores of Fa₂₁, with rims reduced to Fa₁₂. Pyroxene is pigeonite of Fs₁₈,Wo₅. A single augite grain had a composition of Fs₁₅Wo₄₁. The meteorite is a ureilite.

Cross-Polarized Light	Plane-Polarized Light	Cross-Polarized Light	Plane-Polarized Light

Macroscopic Description: Kathleen McBride
Small black patches of fusion crust are visible on the exterior surface. The interior is gray in color and is fine grained. The chondrules/clasts are dark gray in color.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan

Plane-Polarized Light	Reflected Light

The section consists of a few small chondrules (up to 0.5 mm) that have been completely replaced by phyllosilicate set in an Fe-rich serpentine matrix. No isolated mineral grains or CAIs are apparent; sulfide and carbonate grains are present. Unaltered olivine or pyroxene grains of sufficient size for microprobe analyses were not found. The meteorite is a highly altered CM chondrite probably of petrologic type 1.

Macroscopic Description: Kathleen McBride
Brown/black fusion crust covers the surface of this meteorite. The interior matrix is gray with low metal and light gray clasts.

Thin Section (,2) Description: Tim McCoy, Linda Welzenbach
The section exhibits large chondrules (up to 3 mm) and CAIs in a dark matrix. Olivines range from Fa_0-3 and pyroxenes from Fs_0-3. The meteorite is an unequilibrated carbonaceous chondrite, probably a CV3.

MAC 02528 Cross-Polarized Light	MAC 02528 Plane-Polarized Light	MAC 02528 Reflected Light

Macroscopic Description: Kathleen McBride
The entire exterior is covered with shiny brown/black fusion crust. The interior has a rusty, crystalline surface texture with a high metal content.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan

Cross-Polarized Light	Plane-Polarized Light

The section shows an aggregate of small chondrules (up to 1 mm), abundant chondrule fragments, and pyroxene grains in a heavily weathered matrix. Several chondrules contain olivine. Microprobe analyses show the, orthopyroxene is Fs_0-1. The meteorite is an E3 chondrite. The complete weathering of metal makes the subtype (EH vs. EL) uncertain.

Macroscopic Description: Kathleen McBride
The exterior is black without fusion crust. The interior is a black matrix with tiny white inclusions.

Thin Section (,2) Description: Tim McCoy, Linda Welzenbach

Cross-Polarized Light	Plane-Polarized Light

The section consists of a few small chondrules (up to 1 mm), mineral grains and CAIs set in a black matrix; sulfide and carbonate grains are present. Olivine compositions are Fa_0-52, with a peak at Fa_0-1. The matrix consists dominantly of an Fe-rich serpentine; chondrules are relatively unaltered. The meteorite is a CM2 chondrite.

Macroscopic Description: Kathleen McBride
75% of the exterior is covered with black fusion crust with polygonal fractures. The interior is a powdery black matrix with evaporites. Some sub mm light colored chondrules are visible.

Thin Section (,2) Description: Tim McCoy, Linda Welzenbach

Cross-Polarized Light	Plane-Polarized Light

The section consists of a few small chondrules (up to 1 mm), mineral grains and CAIs set in a black matrix; sulfide and carbonate grains are present. Olivine compositions are Fa_0-41, with a peak at Fa_0-1, and orthopyroxene is Fs_1-3. The matrix consists dominantly of an Fe-rich serpentine; chondrules are relatively unaltered. The meteorite is a CM2 chondrite.

Macroscopic Description: Kathleen McBride
Thick, ropey, black fusion crust covers the surface of this carbonaceous chondrite. The black matrix has mm sized light colored chondrules.

Thin Section (,2) Description: Tim McCoy, Cari Corrigan

Plane-Polarized Light

The section consists of a few small chondrules (up to 1 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa_0-40, with a peak at Fa_0-2. The matrix consists dominantly of an Fe-rich serpentine; chondrules are relatively unaltered. The meteorite is a CM2 chondrite and pairing with PCA 02011/02012 is likely.