Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (3)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (4)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (6)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (10)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (11)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (12)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (2)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (3)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (17)
Prof. Mortel:
Almost stuck in the sand (1)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (4)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (5)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (8)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (9)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (10)
Prof. Mortel:
Volcanic landscape at Harrat al-Shabha, east of Umm Lajj, Saudi Arabia (1)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (2)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (3)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (4)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (5)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (6)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (1)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (2)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (3)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (7)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (9)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (10)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (11)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (12)
Prof. Mortel:
Volcanic landscape of Harrat Lunayyir, western Saudi Arabia (13)
