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Natural Arches

A natural arch, natural bridge, or (less commonly) rock arch is a natural rock formation where an arch has formed with an opening underneath. Natural arches commonly form where inland cliffs, coastal cliffs, fins or stacks are subject to erosion from the sea, rivers or weathering (subaerial processes).
Most natural arches are formed from narrow fins and sea stacks composed of sandstone or limestone with steep, often vertical, cliff faces. The formations become narrower due to erosion over geologic time scales. The softer rock stratum erodes away creating rock shelters, or alcoves, on opposite sides of the formation beneath the relatively harder stratum, or caprock, above it. The alcoves erode further into the formation eventually meeting underneath the harder caprock layer, thus creating an arch. The erosional processes exploit weaknesses in the softer rock layers making cracks larger and removing material more quickly than the caprock; however, the caprock itself continues to erode after an arch has formed, which will ultimately lead to collapse.

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Last Activity: 1 Month Ago
Group Leader: gundega
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Submissions: Open
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Founded: September 29th, 2018

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Moon and Stone Arch
Moon and Stone ArchUploaded by: gundega
Date Uploaded: 9/8/21
Resolution: 4915x3072
Downloads: 12
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Favorited: 2
Points: +5
Coast of Spain
Coast of SpainUploaded by: gundega
Date Uploaded: 4/29/20
Resolution: 2304x1440
Downloads: 66
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The Double Arch
The Double ArchUploaded by: gundega
Date Uploaded: 4/15/20
Resolution: 2034x1271
Downloads: 80
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Favorited: 2
Points: +6
The Arch of Cabo San Lucas
The Arch of Cabo San LucasUploaded by: gundega
Date Uploaded: 2/21/20
Resolution: 2048x1280
Downloads: 99
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Rock on Beach in Spain
Rock on Beach in SpainUploaded by: gundega
Date Uploaded: 8/29/19
Resolution: 2048x1280
Downloads: 116
Comments: 1
Favorited: 2
Points: +2
Road in Desert
Road in DesertUploaded by: gundega
Date Uploaded: 6/28/19
Resolution: 1920x1200
Downloads: 130
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Favorited: 4
Points: +6
Rocks in Desert
Rocks in DesertUploaded by: gundega
Date Uploaded: 5/24/19
Resolution: 1920x1200
Downloads: 165
Comments: 1
Favorited: 2
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Sandstone Arch in Utah, USA
Sandstone Arch in Utah, USAUploaded by: gundega
Date Uploaded: 5/24/19
Resolution: 1920x1200
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Arches National Park
Arches National ParkUploaded by: gundega
Date Uploaded: 12/25/18
Resolution: 1440x900
Downloads: 263
Comments: 0
Favorited: 1
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Ice Arch
Ice ArchUploaded by: gundega
Date Uploaded: 11/29/18
Resolution: 1440x900
Downloads: 267
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Favorited: 0
Points: +3
Arc San Felice, Vieste, Italy
Arc San Felice, Vieste, ItalyUploaded by: gundega
Date Uploaded: 11/7/18
Resolution: 1920x1200
Downloads: 210
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Rocky Coast at Sunrise
Rocky Coast at SunriseUploaded by: RockportSpur
Date Uploaded: 7/4/17
Resolution: 1920x1443
Downloads: 46
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Cloudy Beach Sunset
Cloudy Beach SunsetUploaded by: RockportSpur
Date Uploaded: 7/2/17
Resolution: 1920x1262
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Rock Arch in Sunny Sea
Rock Arch in Sunny SeaUploaded by: RockportSpur
Date Uploaded: 7/2/17
Resolution: 1920x1220
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Soft Light over Rocky Seacoast
Soft Light over Rocky SeacoastUploaded by: RockportSpur
Date Uploaded: 6/21/17
Resolution: 1920x1224
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Cave in the Forest
Cave in the ForestUploaded by: RockportSpur
Date Uploaded: 5/26/17
Resolution: 1920x1200
Downloads: 40
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Points: +5
River Arch Falls
River Arch FallsUploaded by: RockportSpur
Date Uploaded: 5/15/17
Resolution: 1920x1141
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Hawaiian Islands Waterfall
Hawaiian Islands WaterfallUploaded by: RockportSpur
Date Uploaded: 4/21/17
Resolution: 2560x1600
Downloads: 100
Comments: 3
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Durdle Door Beach
Durdle Door BeachUploaded by: RockportSpur
Date Uploaded: 4/13/17
Resolution: 1920x1125
Downloads: 43
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Milky Way on the Rocks
Milky Way on the RocksUploaded by: RockportSpur
Date Uploaded: 3/12/15
Resolution: 1920x1200
Downloads: 287
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Mesa Arch at Sunrise
Mesa Arch at SunriseUploaded by: RockportSpur
Date Uploaded: 2/19/15
Resolution: 1920x1200
Downloads: 132
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Points: +8
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