0
0
0

natural arch - choose a jigsaw puzzle to solve

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. The choice between bridge and arch is somewhat arbitrary. The Natural Arch and Bridge Society identifies a bridge as a subtype of arch that is primarily water-formed. By contrast, the Dictionary of Geological Terms defines a natural bridge as a "natural arch that spans a valley of erosion." The largest natural arch, by a significant margin, is the Xianren Bridge in China, with a span of 122 ± 5 meters (400 ± 15 ft).
red rock - landscape, rock, mountains, trees
Play now!
red rock

Added 2 months ago by sandra

94

Grotto in Portugal. - Grotto in Portugal. Benagil.
Play now!
Grotto in Portugal.

Added 3 months ago by Zeta

112

Cliff in Normandy. - Sea cliff in Normandy.
Play now!
Cliff in Normandy.

Added year ago by Zeta

76

rock formations - desert, rocky forms, terrain
Play now!
rock formations

Added year ago by sandra

80

wonders of nature - sea ​​landscape, coast, ocean,
Play now!
wonders of nature

Added year ago by sandra

187

hole rock - rocks, seas, oceans, landscape, coast, tropics
Play now!
hole rock

Added year ago by sandra

281

hole rock - sea, ocean, rocks, coast
Play now!
hole rock

Added year ago by sandra

102

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

109

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

132

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

177

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

183

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

154

Grotto at sea - on the sea, a beautiful cave for swimming
Play now!
Grotto at sea

Added year ago by gabriel

138

Sunset - colorful jigsaw puzzle
Play now!
Sunset

Added year ago by andi

176

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

162

Colorful landscape - a colorful cave puzzle
Play now!
Colorful landscape

Added year ago by andi

97

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

107

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

122

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

229

Sunset - colorful jigsaw puzzle
Play now!
Sunset

Added year ago by andi

159

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

149

Landscape - colorful jigsaw puzzle
Play now!
Landscape

Added year ago by andi

221

Martian landscape - colorful puzzle jigsaw
Play now!
Martian landscape

Added year ago by andi

286

Memory of summer - colorful puzzle jigsaw
Play now!
Memory of summer

Added year ago by andi

371

Azure Window - no longer existing rock bridge off the coast of the island of Gozo in the Republic of Malta
Play now!
Azure Window

Added year ago by Z&S

379

Azure Window - A non-existent rock bridge off the coast of the island of Gozo in the Republic of Malta.
Play now!
Azure Window

Added year ago by Z&S

77

Cypr po prostu - wakacje, morze, ciepło
Play now!
Cypr po prostu

Added over a year ago by polinne

567

ciekawostki Swiata - kamienny most w Poro Rico
Play now!
ciekawostki Swiata

Added over a year ago by renulek

331

Krajobrazy - Cuda natury ...ciąg dalszy:)
Play now!
Krajobrazy

Added over a year ago by Marysia

373

nadmorska jaskinia - woda,skaly,łódka,,jaskinia
Play now!
nadmorska jaskinia

Added over a year ago by wieslawa

157

błękitne groty - Grecja,skały groty,woda,zieleń
Play now!
błękitne groty

Added over a year ago by wieslawa

333 1

Niecodzienne cuda natury - Niecodzienne cuda natury
Play now!
Niecodzienne cuda natury

Added over a year ago by Anita

169

USA Narodowy Park - Piekny widok w Narodowym Parku USA
Play now!
USA Narodowy Park

Added over a year ago by Bożena

227

naturalny most - skała,most drzewa,krzewy,człowiek
Play now!
naturalny most

Added over a year ago by wieslawa

242

skalne przejście - skały,zieleń,trawa,kolor
Play now!
skalne przejście

Added over a year ago by wieslawa

268

piękne miejsca na ziemi - piękne miejsca na ziemi
Play now!
piękne miejsca na ziemi

Added over a year ago by Nikola

448

piękne miejsca na ziemi - piękne miejsca na ziemi
Play now!
piękne miejsca na ziemi

Added over a year ago by Nikola

354

portugalia alvor - piękny portugalski zakątek nad oceanem
Play now!
portugalia alvor

Added over a year ago by Fifka

583

portugalia - piękna zatoczka nad oceanem
Play now!
portugalia

Added over a year ago by Fifka

326

Formacja skalna - Skalny łuk nad małym strumieniem. Pustynny krajobraz z nielicznymi drzewami pod błękitnym niebem
Play now!
Formacja skalna

Added over a year ago by autor

671 1