Because the map does not clearly label this chimney as a distinct, separate, and vertical passage (it looks like a slight bulge on the line), Jones mistook a 10-inch-wide vertical tube for a 45-degree sloping slide. He entered head-first.
The resulting is a masterpiece of by-hand surveying. Unlike a standard tourist map, a caving map uses a "plan view" (a top-down layout) and multiple "profile views" (side-cut diagrams) to show vertical stacking of passages. nutty putty cave map
Cartographers like Brandon Kowallis used these markers to represent "Too Tight," signaling that a crevice continued but was too restrictive for human passability. Because the map does not clearly label this
Official high-res PDF maps can still be purchased from Brandon Kowallis's website . nutty putty cave map