PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM

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

Unit 4 (reference, Deschutes_Formation_strat.jpg). Massive lahar with some
discrete layering. Sequence from bottom to top displays poorly-sorted layers,
massive unit, oxidized layers, crossbeds and vesicular sequence.

High-level Description: Cross-bedded subunit lying on the bottom 2 layers of
Unit 4. Context image 0885 scale is approximate at 2 mm/pxl. Cross-bedded rock
within lahar unit is diagnostic of high fluid content. Embedded grains of
various sizes within a fine-grained gray matrix. Bedding planes are evident.
Black, dark and light gray, white, and red grains are evident. Grain size is
fairly homogenous at approximately .2-1.2 mm. Grains are sub-angular.

Texture
  Grain morphology and appearance: Rough, sub-angular tephra grains in a
clast-supported matrix.
  Grain size and sorting: Poorly-sorted grains averaging about 0.2-0.6 mm, in
a clast-supported matrix.
  Grain fabric:  Polymodal.

Sediment structure:  Cross-bedded lamination.

Color: Light and dark grey, black, white and a few red grains.