https://padlet.com/2057422/3hnnm4nf4289 Weathering and Erosion en-us 2017-11-03 20:19:39 UTC 2017-11-08 04:14:54 UTC hello@padlet.com 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/203470413 The Great Sand Dunes have been formed over thousands of years, as sand deposited by moutain streams and playa lakes on the San Luis Valley floor is carried in the form of small dunes by predominant southwest winds.]]> 2017-11-03 20:25:57 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/203470413 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/203470502 2017-11-03 20:26:23 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/203470502 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/203472094 two weathering processes that continuously work together in eroding the edges of a rock formation known as a fin. The primary weathering force at Bryce Canyon (as one example) is frost wedging. The hoodoos at Bryce Canyon experience over 200 freeze/thaw cycles each year.]]> 2017-11-03 20:33:40 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/203472094 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/203472819 2017-11-03 20:37:32 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/203472819 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/203473520 2017-11-03 20:41:36 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/203473520 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/203473584 The limestone of the  Pinacles came from seashells in an earlier era that was rich in marine life. These shells were broken down into lime-rich sands that were blown inland to form high mobile dunes]]> 2017-11-03 20:41:58 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/203473584 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204016861 2017-11-06 17:43:45 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204016861 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204017553 Arches begin their formation as deep cracks which penetrate into a sandstone layer, then Erosion occurring within the cracks wears away exposed rock layers and enlarges the surface cracks isolating narrow sandstone walls which are called fins]]> 2017-11-06 17:44:49 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204017553 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204020081 2017-11-06 17:48:47 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204020081 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204020418 pile of rocks that accumulates at the base of a cliff, chute, or sloped formed by rocks sliding down a side of rock falling into a pile of other broken pieces]]> 2017-11-06 17:49:25 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204020418 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204023135 2017-11-06 17:54:04 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204023135 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204023265 Formed by flowing water that streams through the area and clears out all loose objects in their path ]]> 2017-11-06 17:54:16 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204023265 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204025534 Forms when moving water in a stream erodes the outer banks and widens its valley, and the inner part of the river has less energy and deposits silt]]> 2017-11-06 17:58:15 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204025534 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204026124 2017-11-06 17:59:22 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204026124 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204027365 2017-11-06 18:01:47 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204027365 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204027770 The meander stream becomes very curved, and eventually the neck of the meander becomes narrower and the river cuts through the neck during a flood, cutting off the meander and forming an oxbow lake.]]> 2017-11-06 18:02:27 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204027770 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204029316 Formed by the gradual removal of slightly soluble bedrock (such as limestone) by percolating water, the collapse of a cave roof, or a lowering of the water table]]> 2017-11-06 18:04:57 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204029316 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204030269 2017-11-06 18:06:28 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204030269 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204031002 2017-11-06 18:07:35 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204031002 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204031424 Limestone is the chief form of calcium carbonate rock, which is dissolved by water that contains carbon dioxide, forming a calcium bicarbonate solution in underground caverns. If stalagmites – the ceiling formations – grow long enough to connect with stalactites on the floor, they form a column.]]> 2017-11-06 18:08:16 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204031424 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204666844 Moraines forms along the sides of a glacier, as the glacier scrapes along, it tears off rock and soil from both sides of its path, this material is deposited as lateral moraines at the top of the glacier's edges. ]]> 2017-11-08 04:02:07 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204666844 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204667833 2017-11-08 04:10:08 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204667833 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204667875 Tectonic stresses and erosion cause granite rock to fracture. Rockfalls later occur along these fractures]]> 2017-11-08 04:10:29 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204667875 2057422 https://padlet.com/2057422/3hnnm4nf4289/wish/204668139 2017-11-08 04:12:29 UTC https://padlet.com/2057422/3hnnm4nf4289/wish/204668139