Please select one of the following symbols: Survey Points Outline of a Gallery Underlying Passage Too narrow Continuation continuation Possible Presumed dimensions of space Ceiling form Dripline - Cross Section Steps Pit Pit open to Surface Aven/Aven-pitchs Contourlines Gradient Arrows/Entrance Arrow Gradient Lines Altitude above Sealevel Difference in Elevation Joint/Fault/Bedding Plane/Inclined Joint Lake/Flowing Water Sump Cascade - Waterfall Spring/Sink Widespread Water Inlet/Seeping Scallops/Flutes in General/Direction of Paleoflow Air draught/Ice - Snow - Firn Stalagmites Stalactites Sinter Curtains/Pillars Helictites/Soda Straws/Crystals Sinter Pools Flowstone/Wall Calcite/Moonmilk North Arrow Geographic and Cartesic North Arrow Magnetic Blocks/Debris Pebbles Clastic sediments: Sand - Silt - Clay - Humus Clay-Covered Walls Guano Camp Height of a Room Anostomosen/Karren Cauliflower-Calcite/Disk Bones Human Activity
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