The HSDP Lithologic Column Explained

• Core Box #s in pink gives the number of the core box which contains the working split of the corresponding segment of core in our storage at Caltech. There are two photographs of each of these boxes available on this server, one raw and one annotated.
• Archive Box #s in cyan gives the number of the Archive box which contains the relevant segment of the archive split, which is kept in Denver. There is a raw photograph of each archive box available on this server.
• Core Run #'s in black refers to pieces of core brought up together from the hole. This is one way to identify sections of core for sampling requests. Depths are marked on the core itself (just visible in the photos) as meters from top of each run.
• Lithologic units: The lithologic units are numbered. Boundaries may be flow boundaries, change in rock type, etc. Each pattern represents the rock type as follows:
  • calcareous sediments or sedimentary rocks
  • sandy sediments, volcaniclastics, hyaloclastite
  • basalt, percent shading = percent phenocrysts
  The color of the fill pattern on some sections of the column are meaningful:
  • Mauna Kea is green
  • Mauna Loa is blue
  • Sedimentary rocks are "peach-like"
• Descriptions gives a brief description of the lithologic units.