<underground_description>Large entrance leads down "slimey" slope into chamber. Rift at North and South ends quickly become too tight. Total rock blockage in floor</underground_description>
<references></references><!-- References to documentation. Could be Journal articles or Logbook entries. Can be links if the docs are online. -->
<survey>2012-ns-03</survey><!-- Drawn-up surveys. Scans of paper surveys or images/PDFs of electronic surveys. Should include HTML to display current plan and elevation, with links to larger versions (See section on URLs and files). Could list links to multiple years of survey, or even a separate survey page if it's complicated enough. -->