meteorite fell at 7:25pm local time on May 2nd, 1939 in Fort
Bend County, Texas, USA. The Meteoritical Bulletin states that a
shower of stones fell at Kendleton and photographs of the trail
and observations of the path of the meteor were obtained.
Thirteen complete stones and about 15 fragments were recovered
with a Total Known Weight of 6937g, the largest weighing 1.6kg
which went into the O.E. Monnig Collection (1939).
Kendleton has been classified as an L4
fragmental regolith breccia with a Shock Rating of S3. Regolith
breccias are fragmental rocks that contain implanted solar-wind
gases and are widely believed to have formed by lithification
[the process or processes by which unconsolidated materials are
converted into coherent solid rock, as by compaction] of
regolith material that once resided at the surface of a body
(Taylor & Wilkening, 1982). About 80% of the Kendleton meteorite
consists of a dark chondritic type-4 matrix with at least four
other types of light & dark coloured clasts. These include
light-coloured type-5 clasts with less-defined chondrules than
the type-4 host matrix, along with light-coloured primitive
type-3 clasts which are likely L3.5.
Kendleton also contains shock-blackened and
melt-rock clasts. The shock-blackened clasts were produced in
post-metamorphic impacts, while the melt-rock clasts were formed
before the end of metamorphism. The shock-blackened clasts are
angular to irregularly shaped with sharp to diffuse boundaries.
They consist of faint, isolated to grouped chondrules;
shock-melted Iron/Nickel (Fe/Ni) & Troilite (FeS); glassy
material and olivines & pyroxenes. A unique tridymite-rich
inclusion was also found during studies which are believed to
originate from the H-Chondrite parent-body due its matching
oxygen isotope. However since they've not been found in
H-Chondrites, a different origin is assumed. It was described as
an inclusion and not a clast because there was no textural
evidence that it was broken from a pre-existing rock although
given its relatively large size, this is likely.
This specimen below
shows some of the clasts mentioned above and was originally part
of the Monnig Meteorite Collection (M-32.4) but is now part of the Meteorites Australia Collection
Origin of Fragmental & Regolith Meteorite Breccias - Evidence
from the Kendleton L Chondrite Breccia.
A. J. Ehlmann et al. (1.72MB)
The Kendleton L4 Fragmental Breccia: Parent Body Surface
A. J. Ehlmann et