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Sample No.: |
|
|
Location: |
Grosvenor Mountains |
|
Dimensions (cm): |
5.5x3.5x 3.0 |
|
Weight (g): |
90.62 |
|
Meteorite Type: |
Howardite |
Macroscopic Description: Kathleen McBride
Ninety five percent of the exterior of this achondrite has smooth, black fusion crust, that appears shiny in some small patches. The interior is gray in color and resembles concrete. Almost no rust is present. There are light colored clasts approximately 1-2 mm in size and a few dark clasts < 1mm in size.
Thin Section (,2) Description: Brian Mason
The section shows a groundmass of comminuted pyroxene and plagioclase grains (up to 0.3 mm) with a few larger plagioclase clasts (up to 1 mm). Microprobe analyses show that most of the pyroxene is hypersthene (Wo1-5, Fs22-34); one grain of augite, Wo36Fs37, was analyzed, and several grains of intermediate composition. Plagioclase composition is An91-96. The meteorite is a howardite, very similar in texture and mineral compositions to GRO95534, 95535, 95581, and 95602, with which it is probably paired.
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Sample No.: |
|
|
Location: |
Grosvenor Mountains |
|
Dimensions (cm): |
5.5x5.5x 3.0 |
|
Weight (g): |
137.77 |
|
Meteorite Type: |
Ureilite |
Macroscopic Description: Kathleen McBride
The exterior of this achondrite has smooth black fusion crust with polygonal fractures and oxidation haloes. The interior is a steel gray in color with numerous dark clasts approximately 1 mm in size. This meteorite is very soft and friable with some rust present.
Thin Section (,2) Description: Brian Mason
The section shows an aggregate of anhedral olivine and pyroxene grains, up to 2 mm across, in a black carbonaceous matrix which contains trace amounts of nickel-iron and troilite. The meteorite appears to be relatively unshocked. Olivine composition is somewhat variable, Fa16-21; pyroxene composition is Wo10Fs18. The meteorite is a ureilite.
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Sample No.: |
|
|
Location: |
Grosvenor Mountains |
|
Dimensions (cm): |
2.5x2.0x1.5 |
|
Weight (g): |
12.69 |
|
Meteorite Type: |
LL3 Chondrite (estimated LL3.8) |
Macroscopic Description: Kathleen McBride
This ordinary chondrite has shiny brown/black fusion crust, with a rough texture. The interior has a white matrix with an oxidation rind. Metal grains and dark gray crystalline clasts are visible. Chondrules are dark gray in color.
Thin Section (,2) Description: Brian Mason
The section shows a closed-packed aggregate of chondrules and chondrule fragments (up to 2.4 mm across) in a dark matrix containing a small amount of nickel-iron and troilite. Weathering is minor, with some brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene of variable composition; olivine, Fa9-29, mean Fa24; pyroxene, Fs3-20. The meteorite is classified as an LL3 chondrite (estimated LL3.8).
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Sample No.: |
|
|
Location: |
Grosvenor Mountains |
|
Dimensions (cm): |
2.5x1.5x0.5 |
|
Weight (g): |
6.08 |
|
Meteorite Type: |
Ureilite |
Macroscopic Description: Carol Schwarz
Eighty percent of this ureilite is covered with fusion crust which is smooth and black on the top and frothy on the bottom. The interior is black with areas of oxidation. Metal and white to yellowish colored mineral grains are visible on the interior and many larger interior grains have obvious cleavage planes. The specimen was very coherent.
Thin Section (,2) Description: Brian Mason
The section shows an aggregate of anhedral grains of olivine and pyroxene, up to 3 mm across. Individual grains are rimmed with carbonaceous material which contains trace amounts of nickel-iron and troilite. The meteorite appears to be relatively unshocked. Microprobe analyses show the following compositions: olivine, Fa22; pyroxene, Wo11Fs18. The meteorite is a ureilite.
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Sample No.: |
|
|
Location: |
Grosvenor Mountains |
|
Dimensions (cm): |
5.5x3.0x2.0 |
|
Weight (g): |
52.2 |
|
Meteorite Type: |
EL6 Chondrite |
Macroscopic Description: Carol Schwarz
This chondrite has thin, remnant, iridescent fusion crust on about 50% of the exterior surface. The interior is dark red brown and contains some evaporate deposits. The specimen is very co-herent because of its high metal content. Several deep fractures pene-trate this meteorite. There are no clasts or chondrules visible on the interior.
Thin Section (,2) Description: Brian Mason
Only vague traces of chondritic structure are visible in the thin section, which shows the meteorite to consist largely of prismatic or granular enstatite (grain size 0.1-0.2 mm), a considerable amount of nickel-iron, and minor amounts of sulfides and plagioclase. The meteorite is considerably weathered, with brown limonitic staining throughout the section. Microprobe analyses show that the enstatite is almost pure MgSiO3 (FeO 0.2-0.5%); one grain of plagioclase, An17, was analyzed; the nickel-iron contains 0.9-1.0% Si. The meteorite is an EL6 chondrite.
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Sample No.: |
|
|
Location: |
Grosvenor Mountains |
|
Dimensions (cm): |
1.0x1.0x1.5 |
|
Weight (g): |
2.42 |
|
Meteorite Type: |
C2 Chondrite |
Macroscopic Description: Kathleen McBride
This carbonaceous chondrite has gray-black, fractured fusion crust. The fusion crust has a slight greenish cast under fluorescent lighting. Some areas are weathered and rusty. The interior reveals a black, fine-grained matrix with very little rust, but weathered evaporites.
Thin Section (,2) Description: Brian Mason
The section shows a close-packed aggregate of small chondrules (up to 0.2 mm across), chondrule fragments, and mineral grains with interstitial black matrix. The chondrules and mineral grains are made up of a fine-grained weakly birefringent material; microprobe analyses indicate that this material is probably an iron-rich serpentine. The meteorite is tentatively identified as a C2 chondrite.
 |
 |
| Cross-Polarized Light | Plane-Polarized Light |
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Sample No.: |
|
|
Location: |
Grosvenor Mountains |
|
Dimensions (cm): |
5.0x3.5x3.0 |
|
Weight (g): |
93.33 |
|
Meteorite Type: |
CV3 Chondrite |
Macroscopic Description: Kathleen McBride
Ninety percent of the exterior of this carbonaceous chondrite is covered by a dull brown/black fusion crust, rough in texture. The matrix is black, soft and friable. Evaporites are present and inclusions are rusty to light colored.
Thin Section (,2) Description: Brian Mason
The section shows numerous chondrules and irregular aggregates, up to 3 mm across, in a black matrix. Trace amounts of metal and sulfide are present as minute grains, mostly within the chondrules. Chondrule types are mainly porphyritic or granular olivine. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa0.3-16, mean Fa3; pyroxene, Fs4-13. The meteorite is classified as a C3 chondrite of the Vigarano subtype.
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Sample No.: |
|
|
Location: |
Grosvenor Mountain |
|
Dimensions (cm): |
3.0x3.0x5.0 |
|
Weight (g): |
57.62 |
|
Meteorite Type: |
LL3 Chondrite (estimated LL3.3) |
Macroscopic Description: Kathleen McBride
The exterior of this ordinary chondrite has dull black fusion crust over 60% of its surface. This fusion crust is striated and rough, with visible bubbles. The interior has a black matrix. Numerous, large (largest ~0.5 cm in diameter) tan and rust colored chondrules and metal grains are present.
Thin Section (,2) Description: Brian Mason
The section shows a close-packed aggregate of chondrules, chondrule fragments and irregular aggregates up to 1.8 mm across, in a small amount of black matrix which contains accessory nickel-iron and sulfide in minute grains. A variety of chondrules are present, including barred olivine, granular and porphyritic olivine and olivine-pyroxene, and radiating and cryptocrystalline pyroxene. Microprobe analyses show olivine and pyroxene of variable compositions; olivine, Fa6-28, mean Fa18; pyroxene, Fs2-21. The meteorite is tentatively classified as an LL3 chondrite (estimated LL3.3).
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Sample No.: |
|
|
Location: |
Mount Wisting |
|
Dimensions (cm): |
4.0x3.5x 1 |
|
Weight (g): |
34.1 |
|
Meteorite Type: |
L3.8 Chondrite |
Macroscopic Description: Carol Schwarz
Fifty percent of the exterior of this meteorite has black fusion crust, the other 50% is dark brown with light clasts/chondrules on the surface. The interior is medium gray with some dark and light inclusions/chondrules. Chondrules are abundant. A thin vein of metal runs through the interior.
Thin Section (,2) Description: Brian Mason
The section shows a close-packed aggregate of chondrules and chondrule fragments (up to 2.5 mm across) in a dark matrix containing a small amount of nickel-iron and troilite. The meteorite is considerably weathered, with brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa18-26,, mean Fa22; pyroxene, Fs11-22.. The meteorite is classified as an L3 chondrite (estimated L3.8).
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Sample No.: |
|
|
Location: |
Elephant Moraine |
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Dimensions (cm): |
2.0x1.5x1.0 |
|
Weight (g): |
5.79 |
|
Meteorite Type: |
Ureilite |
Macroscopic Description: Kathleen McBride
This meteorite has a smooth black fusion crust which covers ~50% of the exterior surface area. The material underlying the fusion crust that is exposed reveals a greenish colored matrix and is very fine grained. It also contains very small white-cream colored inclusions. These inclusions are <1 mm in diameter. The interior of this achondrite is rather non-descript. It is black in color and very fine grained with very few inclusions that are < 1 mm in diameter.
Thin Section (,3) Description: Brian Mason
The section shows a microbreccia of olivine clasts (up to 1.2 mm across) with a little plagioclase and polysynthetically twinned pyroxene in a black matrix. Traces of nickel-iron and troilite are present along grain boundaries. The meteorite appears to be unweathered. Microprobe analyses show olivine of variable compositions: Fa16-25,, mean Fa20. One grain of plagioclase, An36, was analyzed. The meteorite is classified as a ureilite.
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Sample No.: |
|
|
Location: |
Elephant Moraine |
|
Dimensions (cm): |
3.0x2.0x1.5 |
|
Weight (g): |
10.12 |
|
Meteorite Type: |
Howardite |
Macroscopic Description: Kathleen McBride
The exterior of this meteorite has brown, bubbly fusion crust. Patches of black, glassy material are visible in certain areas on the fusion crust. The interior is a fine grained, tan matrix with numerous inclusions. These include one perfectly round, black glass bead, numerous green crystalline fragments, some as large as 5 mm across, basalt fragments and light gray and white fragments. Clear crystals and reddish mineral grains are found near the fusion crust. This meteorite was brecciated and very friable.
Thin Section (,4) Description: Brian Mason
The section shows a microbreccia of comminuted pyroxene and plagioclase (grains up to 0.3 mm) with a few larger plagioclase clasts (up to 2.4 mm). Microprobe analyses show that most of the pyroxene is hypersthene (compositions clustered around Wo3Fs26) with some pigeonite (Wo5-14Fs35-52). Plagioclase composition is An91-95. The meteorite is a howardite.
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Sample No.: |
|
|
Location: |
Elephant Moraine |
|
Dimensions (cm): |
3.5x2.0x1.5; 3.0x2.0x1.5 |
|
Weight (g): |
15.64; 13.35 |
|
Meteorite Type: |
Howardite |
Macroscopic Description: Kathleen McBride
These achondrites are covered with a black patchy fusion crust with a shiny luster and some glassy appearing areas. Fusion crust covers 50% of the exterior surfaces. The interior is a dull, powdery gray matrix with numerous tan and white angular to sub-angular inclusions, mm size in diameter.
Thin Section (EET96003,4; 96004,4)Description: Brian Mason
The sections are so similar that a single description will suffice; the meteorites are probably paired. The sections show a groundmass of comminuted pyroxene and plagioclase (average grain size 0.1 mm), with a few larger clasts (up to 2 mm) of these minerals. Section 96003,4 has a coarse-grained gabbroic clast 6 mm across. Microprobe analyses show that most of the pyroxene is hypersthene (Wo1-5, Fs31-45); one grain of augite, Wo38Fs21, was analyzed, and a few grains of intermediate composition. Plagioclase composition is An82-95. The meteorites are howardites.
 |
 |
| EET96003 | EET96004 |
|
Sample No.: |
EET96005;
EET96006; EET96011; EET96013; EET96014 |
|
Location: |
Elephant Moraine |
|
Dimensions (cm): |
1.0x1.0x0.5;
4.5x3.5x2.5; 2.0x2.5x1.0; 1.7x1.5x0.7; 1.5x1.5x 0.7 |
|
Weight (g): |
1.36;
42.2; 5.34; 2.13; 2.34 |
|
Meteorite Type: |
C2 Chondrites |
Macroscopic Description: Kathleen McBride
These carbonaceous chondrites a have black, rough fusion crust with a dull luster. The surface is pitted and bubbles are present on some of the exterior. The interior is a dull black color with some gray, splotchy inclusions and minor rust. Most of the inclusions are <1 mm in size.
Thin Section (EET 96005,2; 96006,2; 96011,2; 96013,2; 96014,2) Description: Brian Mason
 |
| EET96005 |
|
Sample No.: |
|
|
Location: |
Elephant Moraine |
|
Dimensions (cm): |
4.5x3.5x1.5 |
|
Weight (g): |
52.97 |
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Meteorite Type: |
Lunar Basaltic Breccia |
Macroscopic Description: Kathleen McBride
50% of this meteorite is covered by a black glassy fusion crust. Areas that lack fusion crust appear virtually unweathered. The fusion crust is very thinly distributed over the surface of the rock. The matrix is fine grained, medium gray with numerous inclusions. These inclusions are white, light gray and tan and are angular and subangular in shape. Metal and rust are not visible. This is a brecciated basalt, possibly lunar in origin.
Thin Section (,4) Description: Brian Mason
The section shows a microbreccia of pyroxene and plagioclase clasts, up to 1.2 mm across; traces of nickel-iron and sulfide are present, as small scattered grains. Microprobe analyses show that most of the pyroxene ranges from Wo11Fs31 to Wo40 Fs18, with a few more iron-rich grains; plagioclase composition is An93-96. A few olivine grains of variable composition, Fa41-64, were analyzed. Fe/Mn in pyroxene is about 70. The meteorite is a lunar basaltic breccia.
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Sample No.: |
|
|
Location: |
Elephant Moraine |
|
Dimensions (cm): |
2.5x2.5x2.0 |
|
Weight (g): |
16.3 |
|
Meteorite Type: |
CV3 Chondrite |
Macroscopic Description: Kathleen McBride
The exterior of this carbonaceous chondrite is black with light colored chondrules. Only small patches of purplish fusion crust remain. It is pitted and has a rough texture. The matrix is black with light colored chondrules, mm in size. It is very soft and chondrules fall out easily or break. There are some areas of rust but the amount of metal seems minor.
Thin Section (,5) Description: Brian Mason
The section shows numerous chondrules and chondrule fragments, up to 3 mm across, in a black matrix. Trace amounts of nickel-iron and sulfide are present as minute grains dispersed through the matrix. Microprobe analyses show that most of the chondritic olivine is close to Mg2SiO4 in composition, with some more iron-rich grains; pyroxene composition is Fs1-3. The matrix appears to consist largely of iron-rich olivine, around Fa45.. The meteorite is a C3 chondrite of the Vigarano subtype.
 |
 |
| Cross-Polarized Light | Plane-Polarized Light |
|
Sample No.: |
|
|
Location: |
Elephant Moraine |
|
Dimensions (cm): |
0.75x0.75x0.5 |
|
Weight (g): |
0.52 |
|
Meteorite Type: |
L3.4 Chondrite |
Macroscopic Description: Kathleen McBride
The exterior of this ordinary chondrite has black patches of fusion crust with some brown rusty areas visible. The interior is a gray matrix with irregularly shaped euhedral/subhedral inclusions. The inclusions have dark rims and have an almost "interlocking" appearance. These inclusions are various colors and sizes.
Thin Section (,3) Description: Brian Mason
The section shows a close-packed aggregate of chondrules and chondrule fragments, up to 1.2 mm across, in a small amount of black matrix which contains accessory nickel-iron and troilite. Microprobe analyses show olivine of variable composition, Fa2-33, with a mean of Fa12. Pyroxene composition is Fs2-6.. The meteorite is an L3 chondrite (estimated L3.4).
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Sample No.: |
|
|
Location: |
Elephant Morraine |
|
Dimensions (cm): |
2.5x1.5x0.5 |
|
Weight (g): |
5.89 |
|
Meteorite Type: |
C2 Chondrite |
Macroscopic Description: Katlheen McBride
Thin purplish fusion crust covers 90% of the exterior surface. Polygonal fractures are present on the surface and the fusion crust has a very fine bubbly texture, almost iridescent in nature. The interior is dull black with a white evaporite ring between the fusion crust and matrix. A few visible chondrules are present.
Thin Section (,2) Description: Brian Mason
The section shows numerous chondrules, chondrule fragments, and small mineral grains in a black matrix; fusion crust is present along one edge. The chondrules and many of the mineral grains consist of an isotropic to weakly birefringent serpentine; a few of the mineral grains consist of calcite. The meteorite is a C2 chondrite, but differs in mineral composition and texture from the EET96005 C2 group.
 |
 |
| Cross-Polarized Light | Plane-Polarized Light |
|
Sample No.: |
|
|
Location: |
Elephant Morraine |
|
Dimensions (cm): |
5.0x4.0x5.5 |
|
Weight (g): |
225.997 |
|
Meteorite Type: |
R3 Chondrite |
Macroscopic Description: Kathleen McBride
The exterior is smooth and greenish-black in color with small, light colored inclusions visible. Only a thin, black fusion crust remains in a small area. The interior of this meteorite is dark gray with dark, angular, black clasts. Some lighter colored inclusions are present. The matrix is dull and very fine grained.
Thin Section (,2) Description: Tim McCoy
The meteorite consists of chondrules (0.5-1 mm diameter), mineral grains and fragments, and a chondritic clast (3 mm across) in a fine-grained silicate matrix. Minor, fine-grained Fe,Ti-oxides and sulfides occur scattered throughout the meteorite. Weathering is minor. Olivine compositions exhibit a broad range (Fa3-39), with most grains Fa30-39. Low-Ca pyroxene ranges from Fs5-19. The meteorite is an R3 chondrite (estimated subtype 3.6) and is similar to PCA 91002 (1994, Meteoritics 29, 255).
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Sample No.: |
|
|
Location: |
Elephant Morraine |
|
Dimensions (cm): |
15.0x11.0x8.5 |
|
Weight (g): |
848.28 |
|
Meteorite Type: |
C2 Chondrite |
Macroscopic Description: Kathleen McBride
The exterior of this carbonaceous chondrite is black with small white inclusions. There is very little fusion crust, which is purplish in color. Numerous circular pits or vugs and some evaporites are present. The interior is black with small white inclusions. The matrix is powdery, but coherent. Small inclusions are visible.
Thin Section (,7) Description: Tim McCoy
The section exhibits numerous small chondrules (most less than 0.5 mm), larger CAIs and mineral fragments in a black matrix. A 7 mm diameter clast is apparent in reflected light. Trace amounts of metal and troilite are present. The matrix appears to consist of serpentine. Olivines exhibit a range from Fa0-39, with most Fa0-2. Pyroxenes range from Fs2-5. The meteorite is a C2 chondrite. The meteorite may be paired with the EET96005 group.
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Sample No.: |
EET96031,
EET96037, EET96040, EET96047 |
|
Location: |
Elephant Morraine |
|
Dimensions (cm): |
7.5x5.0x4.0;
8.5x6.5x3.0; 7.5x3.0x5.5; 6.0x4.0x4.0 |
|
Weight (g): |
414;
325.7; 276.2; 139.41 |
|
Meteorite Type: |
H4 Chondrites |
Macroscopic Description: Kathleen McBride
The exteriors of these chondrites are covered with thin, patchy black fusion crust. They all have iridescent oxidation haloes and a few fractures. The interior is fine grained with some dark gray matrix visible. Some rust colored grains and metal are present. These meteorites are hard and coherent.
Thin Section (EET96031,2; 96037,2; 96042,2; 96047,2) Description: Tim McCoy
 |
| EET96031 |
|
Sample No.: |
|
|
Location: |
Elephant Morraine |
|
Dimensions (cm): |
5.5x5.5x3.5 |
|
Weight (g): |
249.8 |
|
Meteorite Type: |
Ureilite |
Macroscopic Description: Kathleen McBride
The exterior of this meteorite is dark gray to black. Fusion crust covers ~80% of the surface area. Exposed interior is dark gray in color. The interior is dark, blackish-green crystalline texture. Some transparent, clear and light yellow crystals are present. It has a coarse grained texture with some dull rusty areas. Overall it has a dull metallic appearance. This achondrite is very coherent and difficult to break.
Thin Section (,7) Description: Tim McCoy
The section consists of an aggregate of olivine grains up to 3 mm across. Individual grains are rimmed by moderately-weathered carbon-rich material containing traces of metal and troilite. Olivine grains exhibit undulatory extinction. Olivine grains have core compositions of Fa18, with rims reduced to Fa14. The meteorite is a ureilite.
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Sample No.: |
|
|
Location: |
Meteorite Hills |
|
Dimensions (cm): |
11.0x8.0x6.0 |
|
Weight (g): |
592.9 |
|
Meteorite Type: |
Howardite |
Macroscopic Description: Kathleen McBride
The dull fusion crust on this achondrite is dark brown and thin and covers approximately 25% of the exterior. The exposed interior has weathered to a cement gray-yellow-orange color. It is pitted and friable. The fresh interior surface is off white to yellow and fine grained, with a sugary/crystalline texture. There are numerous inclusions of various sizes - rounded/subrounded to angular clasts and grains. Some metal and rusting is visible.
Thin Section (,6) Description: Brian Mason
The section shows a groundmass of comminuted pyroxene and plagioclase (grains up to 0.2 mm) with a few larger plagioclase clasts (up to 2 mm). Microprobe analyses show that most of the pyroxene is hypersthene (Wo1-4, Fs20-30); one grain of augite, Wo41Fs20, was analyzed, and several grains of intermediate composition. Plagioclase composition is An89-92. One grain of a SiO2 polymorph was analyzed. The meteorite is classified as a howardite.