Updated 5th May 2001; 2nd November 2002; 23rd December 2008; 17th October 2015; 30th November 2016; 22nd May 2017; 7th May, 23rd September 2018; 14th May, 5th June, 14th September 2019; 15th June 2020
An easily missed entrance - it couldn't be found in the summer 2015 - that immediately slopes down and enlarges to a phreatic passage and a dig in the floor. A trench has been dug along one wall.
Excavations in April 2018 were concentrated against the hading wall nearest the entrance where, a few metres down, the wall started to curve under. There may be a draught but, as one wall in the rift is mud and rock and it is the route for surface water, the dig was thought likely to slump in before shoring could occur.
In the summer 2018, some shoring was installed and further progress was made under the wall.
At Easter 2019, further digging took place and there were also visits by members of the Matienzo Karst Entomology Project - who found a possible Iberina mazarredoi spider, and the first psuedoscorpion reported in a Matienzo cave. This latter sighting might be a first for a Cantabrian in-cave find. Jess Eades also visited, looking for bats. In early June, some bones from the site were identified by palaeontologist Pedro Castaños as red deer. A bear tooth was found in the summer 2019. Spanish experts Pedro Castaños (large mammals) and Xabier Murelaga (small mammals) dug out more bones on the top level, identifying bison or auroch.
In the summer 2019, further digging took place at the bottom and also up off the bottom, where a tight, standup "chamber" was entered through a sandy dig. Prospects at this level look poor so the plan is to continue digging below.
The site has been excavated by Spanish archaeologists and has some prehistoric significance. A large number of butchered bones have been studied but no flints have been found. The site is classified as an occasional palaeolithic habitat (Ruiz Cobo Jesús et al, 2008).
An earlier GPS reading is 30T 453033 4798234 (Datum: ETRS89)
Reference: anon., 1991 (logbook); anon., 1993c (Easter logbook); anon., 2001a (Easter logbook); pers comm (email 24/6/02); Ruiz Cobo Jesús and Smith Peter, 2003 (survey and photo); Ruiz Cobo Jesús et al, 2008 (survey); anon., 2015c (summer logbook); anon., 2016d (autumn logbook); Ruiz Cobo Jesús, 2016b; anon., 2017b (Easter logbook); anon., 2018b (Easter logbook); anon., 2018c (summer logbook); anon., 2019b (Easter logbook); anon., 2019d (summer logbook);
Entrance pictures : 2002, 2016, 2018 & 2019 : video, April 2018 (YouTube)
Underground pictures: April 2018 : August 2018 : April 2019 : summer 2019: IR photos summer 2019
Misc: Bones found, August 2018 : teeth & bones found, summer 2019
Video: Excavation, April 2018 (YouTube) : summer 2019 (YouTube)
Detailed Survey : sketch from log book survey from Ruiz Cobo Jesús et al, 2008
Line Survey :
On area survey :
Survex file : April 2018