The measurement and data reduction methods were described by Hasan et al. (1987, Proc. 17th LPSC, E703-E709; 1989, LPSC XX, 383-384).  For meteorites whose TL lies between 5 and 100 krad, the natural TL is related primarily to terrestrial history.  Samples with NTL <5 krad have TL levels below that which can reasonably be ascribed to long terrestrial ages.  Such meteorites have had their TL lowered by heating within the last million years or so by close solar passage, shock heating, or atmospheric entry, exacerbated in the case of some achondrites by anomalous fading. We suggest meteorites with NTL >100 krad are candidates for unusual orbital/thermal histories (Benoit and Sears, 1993, EPSL, 120, 463-471).

The quoted uncertainties are the standard deviations shown by replicate measurements on a single aliquot.

COMMENTS: The following comments are based on natural TL data, TL sensitivity, the shape of the induced TL glow curve, classifications, and sample descriptions.

QUE 99029 and EET 99424 have very low TL sensitivity compared with other equilibrated ordinary chondrites and may be extensively shocked.

Pairings suggested by TL data:

• H5: QUE 99008 with QUE 99014.
• L5: MIL 99319 with MIL 99320.