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Piled up geological rock formations on the beach of Tenerife
Stacked volcanic rock forms the exterior wall of an ancient Sinagua Indian cliff dwelling on a high desert canyon promentory.  This wall contains a portal through which arrows could be fired at an enemy while permitting concealment from attack.  Visibility from this vantage ponit is also very good for hundreds of yards across the desert terrain. The Sinagua Indian tribe that selected this site did so for its defensible position.  On the opposite side of the site a sheer cliff drops to a long steep hill that descends to a dry riverbed - allowing no access from that side.  Site selection was critical for the Sinagua, and perfectly executed here. This culture combined hunting and gathering with agriculture, but the latter was challenging in this arrid, high desert wilderness terrain. The exact site location, which requires considerable effort to reach, is intentionally omitted. Its estimated age dates to 1300 AD - 1400 AD. Remote Sinagua Cliff Dwelling Site, Northern Arizona, 2013.
Close-up of Gran Canaria mountain texture, revealing nature's raw beauty
Background from many small granite stones. Gravel pebbles stone texture. Grey background of crushed granite gravel, close up.
volcanic landscape in Teide nature reserve
Famara volcanic geology in Lanzarote,  Canary Islands
Closeup of large rocks or boulders near the mountains. Large multicolored granites. Details of big grey stone structures with orange particles shining in the sunlight. Sandstones with rough textures
Rock isolated on white background,Cut out,convenient for matte painting
Ruins of Wiracocha Temple, Cusco Region, Peru, South America
Scenic canyon in Deyang, China
the sandstone
Landscapes of Tenerife, Canary Islands. Parque rural de Teno
layered sandstone wall of the Numeira canyon shows ripples from erosion, Wadi Numeira, Dead Sea valley
Design element of rocky land over white
Brown mineral formations on the surface of a cliff on the island of Tenerife, Spain. Natural wall with exotic plants in the Canary Islands. Geological background
Volcanic Rock in Pyrgos Kallistis on Santorini in South Aegean Islands, Greece
Rock formations on Oahu coast
Beautiful view of mountain landscape of island of Gran Canaria from highway leading up mountain.
landscape of the Teide volcano in Tenerife
Beautiful landscape mountain range and forest
Nature and landscape with volcanic formation mountains in Gran Canaria island. View from the panoramic road, on the mountain ranges of the island of Gran Canaria. View of the mountain range of the Reserva Natural Especial de Güigüí.
Barranco de Guayadeque mountains
A rock formation with a tree growing out of it. The rock formation is made up of many layers of different colors
Lava Rock Wall
Ancient handcrafted stone wall. The multi-colored exposed stone, brick and mineral layer. Stone pattern, geological texture. Bright red-brown stone background. Abstract background.
Old ruins of farmers in Teno Alto rural park, Tenerife, Canary Islands.
A rock wall in Big Island, Hawaii.
Cuore di pietra sull'Isola di Strombolicchio
Soil profile of ash layers covered by lava rock in the caldera of Tenerife, Spain.
Twisted rock strata
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Here_is_the_second_rock_shelter_that_can_be_found_along_the_glacial_boulder_deposit_cliff._It_is_strange,_but_it_looks_like_there_was_some_kind_of_water_erosion_at_the_back_of_the_rock_shelter._Maybe_there_was_some_mining_activity._It_also_looks_like_it_h.jpg
FMIB_39523_Conglomerate_boulder_found_in_Boone_County,_Kentucky.jpeg
FMIB_39542_Vessel_Rock,_a_glacial_boulder_in_Gilsum,_New_Hampshire.jpeg
Cauce río Tambre 1.jpg
More_evidence_of_break_off_activity_along_the_glacial_boulder_deposit_cliff..jpg
Glacial_boulder_break_off_activity_strewn_at_the_foot_of_the_cliff_face_to_my_left..jpg
Another_view_of_glacial_boulder_break_off_activity_right_outside_the_first_rock_shelter..jpg
This_is_the_view_just_outside_of_the_rock_shelter,_along_the_edge_of_the_glacial_boulder_break_off_field..jpg
Another_view_of_the_glacial_boulder_break_off_field,_outside_of_the_rock_shelter,_facing_I-95_North..jpg
It_looks_like_there_is_a_very_large_boulder_just_waiting_to_slide_off_into_the_break_off_field_below..jpg
Another_view_off_the_larger_rocks_found_in_the_glacial_boulder_break_off_dispersion_field._This_photo_shows_one_of_the_larger_ones_with_the_glacial_deposit_cliff_in_the_background..jpg
I_am_currently_at_the_rock_shelter_along_I-95,_at_the_extreme_edge_of_the_Guilford_glacial_boulder_break_off_field._This_view_is_from_the_rock_shelter_overlooking_the_north_side_of_the_highway..jpg
We_get_a_better_view_of_the_glacial_boulder_cliff_face_from_a_point_just_outside_of_the_second_rock_shelter._We_can_see_the_very_large_boulder_perched_on_the_cliff_top,_probably_one_earthquake_away_from_falling_over..jpg
This_shows_that_the_rock_shelter_that_I_just_emerged_from_is_formed_by_the_process_of_a_large_chunk_of_glacially_deposited_boulder_breaking_off_and_forming_cavities_with_rocks_that_were_below_it..jpg
A_slab_of_glacial_boulder_beginning_to_slide_and_break_off._It_is_the_result_of_ice_freezing_inside_of_the_crevice_and_expanding_slowly,_pushing_off_the_rock_sliver._This_process_may_be_accelerated_up_by_earthquake_activity..jpg
Hitchhiker waits for ride from Black Hawk to Boulder (Nara) - 544807(enhanced).jpg
Here_is_a_saddle_point_by_which_you_can_get_to_the_top_of_the_glacial_boulder_deposit_cliff._However_it_still_does_require_some_careful_rock_climbing._Please_be_careful_when_going_through_these_boulders,_as_it_is_easy_to_fall_or_trip._This_is_especially.jpg
Detail_of_pot-hole_erosion_along_the_river_gorge_on_the_Nevada_side_just_downstream_from_damsite_proper._Note_the..._-_NARA_-_293848.tif
Detail_of_pot-hole_erosion_along_the_river_gorge_on_the_Nevada_side_just_downstream_from_damsite_proper._Note_the..._-_NARA_-_293848.jpg
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The_Quarterly_journal_of_the_Geological_Society_of_London_(12471641734).jpg
The_Quarterly_journal_of_the_Geological_Society_of_London_(13935627262).jpg
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