Ilakaka sapphire mine, one of Earth's largest known alluvial sapphire deposits, Ilakaka, Ihorombe Region, Madagascar, Africa

Ilakaka sapphire mine, one of Earth's largest known alluvial sapphire deposits, Ilakaka, Ihorombe Region, Madagascar, Africa

Ilakaka sapphire mine, one of Earth's largest known alluvial sapphire deposits, Ilakaka, Ihorombe Region, Madagascar, Africa

Ilakaka sapphire mine, one of Earth's largest known alluvial sapphire deposits, Ilakaka, Ihorombe Region, Madagascar, Africa

Large alluvial fans along wall of Tempelfjorden, Spitsbergen, Svalbard, Arctic, Norway, Europe

Alluvial fan, Adventdalen,Spitsbergen, Norway, Scandinavia, Europe

Volcanic Terrain of Central Andes

Alluvial Fan, China

Breakwaters or groynes, coastal protection measures, Noderfriedrichskoog tidal flats, Nationalpark Schleswig-Holsteinisches Wattenmeer, Schleswig-Holstein Wadden Sea National Park, Eiderstedt peninsula, North Friesland region, Schleswig-Holstein, Germany,

View across the Wadden Sea with coastal protection, groynes, Hallig Langeness, small island, at back, North Sea shore, Schleswig-Holstein Wadden Sea National Park, Dithmarschen region, Schleswig-Holstein, Germany, Europe

Fence in the floodplains of Neufelder Koog, polder, Elbe estuary, North Sea coast, Schleswig-Holstein Wadden Sea National Park, Dithmarschen region, Schleswig-Holstein, Germany, Europe

Alluvial jellyfish on the coast of Hammamet, Tunisia

Large flock of waders, red knots (Calidris canutus) and oystercatchers (Haematopus ostralegus) above the alluvial area Wash, Snettisham, Norfolk, England

Large flock of waders, red knots (Calidris canutus) and oystercatchers (Haematopus ostralegus) above the alluvial area Wash, Snettisham, Norfolk, England

High water in an alluvial forest near Dessau, Mittlere Elbe biosphere reserve on the Elbe river, Saxony-Anhalt, Germany, Europe

Aerial View Of Low Tide In The Stikine River Delta On A Clear Day, Wrangell, Southeast Alaska, USA, Spring

Aerial View Of Low Tide And Woronkofski Island In The Stikine River Delta On A Clear Day, Wrangell, Southeast Alaska, USA, Spring

Aerial View Of A Winding River Connecting Snow-Capped Mountains To Cook Inlet, Southcentral Alaska, USA, Summer