Theory proposed: ruts formed while volcanic tuff was still pliable and soft. Listener theory proposes carts moved across the tuff while the surface was still pliable Pyroclastic flow surfaces can harden before lower layers, similar to wet cement Primitive cements made from wood ash can remain pliable for long periods without heat hardening

A listener theory suggests carts rolled across tuff while it was still pliable — like wet cement. Pyroclastic surfaces can harden top-down, leaving lower layers soft. Similar rounded ruts at White Sands were attributed to drag carts in soft conditions. This could explain apparent splashing marks along the rut edges. 🧱

Key Facts

  • Listener theory proposes carts moved across the tuff while the surface was still pliable
  • Pyroclastic flow surfaces can harden before lower layers, similar to wet cement
  • Primitive cements made from wood ash can remain pliable for long periods without heat hardening
  • Footprints have been documented in unsolidified volcanic tuff that cooled but did not fully harden
  • Rounded ruts at White Sands were attributed to primitive drag carts in similar conditions
  • The theory accounts for areas with apparent splashing marks in the ruts

Related site: Cwm Era Slate Quarry, Dulas Valley;Fronfelin; Fronfelin Slate Quarry — view location, images, and history on the Ancient Nerds map.