PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM

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

Gisjukvisl flow bed

Site SS-1, Gisjukvisl flow bed proximal to terminal moraine, 63 degrees
N57.535, 17 degrees W19.701, 5 km off Road 1. Floor bed is 50-70% pebble-sized
or larger particles, approximately 15% particles 50 cm or larger.

Within the flowbed, fragments range from sand-sized to 2 m blocks, with the
majority of cobble-to-boulder-sized blocks in the 10-50 cm range. Basement
pebbles are 1-3 cm, averaging 1.75 cm in diameter, and cover the ground,
anchoring underlying finer-grained material. Presumably surface finer-grained
material was mobilized by wind and winnowed out like a desert pavement,
transported downstream. "Hills" contain more friable fragments, including
hyaloclastites with lithics entrained (10-15% by volume). Additionally, "hill"
surface materials are larger; 50-70% by volume are 5-20 cm in diameter with
smaller clasts interstitially placed. By contrast, friables and hyaloclastites
are absent from the flowbed floor. Composition is 95% basalt. Broken fragments
are common throughout the region.

Samples are taken from the bottom of the trench, to avoid contamination with
organics.