PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM

OBJECT                = TEXT
  PUBLICATION_DATE    = 2009-11-15
  NOTE                = "Sample description"
END_OBJECT            = TEXT
END

High-level Description: Unit 4. Sequence of eight brown fine ash layers
interbedded with coarse ash (image 3931 shows contact between two of these
layers). Unit is comprised of angular, vitric grains; finer grains are buff
and coarser grains are dark grey. Approximately 10% of grains are olivine
crystals.

Texture
  Grain morphology and appearance: Coarse layers are comprised of dark grey,
sub-angular particles in a clast-supported matrix, while fine layers are
angular, buff fine ash grains.  Texture of coarse grains is rough and rubbly.
  Grain size and sorting:  Ash grains <0.6 (fine ash) to 2 mm diameter (coarse
ash).
  Grain fabric:  Random orientation.

Sediment structure:  Parallel lamination.

Color:  Grey (coarse) and buff (fine) grains.