A large depression with many shakeholes, three of which have undescended shafts.

On an extensive search of the depression in 1989 no holes were seen.

According to Actividades Regionales. Exploraciones en Cantabria (anon., 1993a) there are two shafts to the east and south of this depression (numbered 962 and 963).

References: anon., 1981a (logbook); Corrin J, 1983c; anon., 1989 (logbook); anon., 1993a
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