Prof. Mortel:
Bimmah Sinkhole, Oman (2)
Prof. Mortel:
Bimmah Sinkhole, Oman (3)
Prof. Mortel:
Bimmah Sinkhole, Oman (4)
Prof. Mortel:
Bimmah Sinkhole, Oman (5)
Prof. Mortel:
Bimmah Sinkhole, Oman (6)
Prof. Mortel:
Bimmah Sinkhole, Oman (7)
Prof. Mortel:
Bimmah Sinkhole, Oman (8)
Prof. Mortel:
Bimmah Sinkhole, Oman (9)
Prof. Mortel:
Bimmah Sinkhole, Oman (10)
Prof. Mortel:
Bimmah Sinkhole, Oman (1)