Scree in the context of Sedimentary deposits

Superficial deposits (or surficial deposits) refer to geological deposits typically of Quaternary age (less than 2.6 million years old) for the Earth. These geologically recent unconsolidated sediments may include stream channel and floodplain deposits, beach sands, talus gravels and glacial drift and moraine. All pre-Quaternary deposits are referred to as bedrock.

Mass wasting, also known as mass movement, is a general term for the movement of rock or soil down slopes under the force of gravity. It differs from other processes of erosion in that the debris transported by mass wasting is not entrained in a moving medium, such as water, wind, or ice. Types of mass wasting include creep, solifluction, rockfalls, debris flows, and landslides, each with its own characteristic features, and taking place over timescales from seconds to hundreds of years. Mass wasting occurs on both terrestrial and submarine slopes, and has been observed on Earth, Mars, Venus, Jupiter's moon Io, and on many other bodies in the Solar System.

Subsidence is sometimes regarded as a form of mass wasting. A distinction is then made between mass wasting by subsidence, which involves little horizontal movement, and mass wasting by slope movement.

Happy Isles is a group of small isles in the Merced River in Yosemite National Park, California, USA. They are located at the easternmost end of the Yosemite Valley floor. This scenic spot is the starting point for the Mist Trail, and is also the northern trailhead for the John Muir Trail. Happy Isles is also the trailhead for popular hiking destinations along the Mist Trail (including Vernal Falls and Nevada Falls) and Half Dome.

Happy Isles is located where the slope of the Merced River changes from the much steeper upper main stem to the essentially flat Valley floor. At Happy Isles, the river gradient is approximately 2%. The gradient of the Merced River at Happy Isles is steeper than in the Valley floor, and the channel of the river is cut into erosion-resistant granitic boulders and talus materials, compared to channel deposits of sands and gravel present on the Valley floor. The steeper gradient and composition of streambed materials together impede meandering patterns from developing in this area.

The Stiperstones (Welsh: Carneddau Teon) is a distinctive hill in Shropshire, England. The quartzite rock of the ridge formed some 480 million years ago. During the last Ice Age Stiperstones lay on the eastern margin of the Welsh ice sheet. The hill itself was not glaciated though glaciers occupied surrounding valleys and it was subject to intense freezing and thawing which shattered the quartzite into a mass of jumbled scree surrounding several residual rocky tors. At 536 metres (1,759 ft) above sea level it is the second-highest hill in the county, surpassed only by Brown Clee Hill (540 metres (1,772 ft)). Stiperstones' 8-kilometre (5 mi) summit ridge is crowned by several jagged outcrops of rock, which may be seen silhouetted against the sky.

Lassen Peak (/ˈlæsən/ LASS-ən), commonly referred to as Mount Lassen, is a 10,457-foot (3,187 m) lava dome volcano in Lassen Volcanic National Park in Northern California. Located in the Shasta Cascade region above the northern Sacramento Valley, it is the southernmost active volcano in the Cascade Range of the Western United States, and part of the Cascade Volcanic Arc stretching from southwestern British Columbia to Northern California. It supports many flora and fauna among its diverse habitats, which reach high elevations and are subject to frequent snowfall.

Lassen Peak has a volume of 0.6 cu mi (2.5 km), making it one of the largest lava domes on Earth. The volcano arose from the former northern flank of now-eroded Mount Tehama about 27,000 years ago, from a series of eruptions over the course of a few years. The mountain has been significantly eroded by glaciers over the last 25,000 years, and is now covered in talus deposits.

The American pika (Ochotona princeps) is a small, herbivorous mammal of the family Ochotonidae, closely related to rabbits and hares (order Lagomorpha). It is native to the mountainous regions of western North America, typically inhabiting rocky slopes and talus fields at or above the tree line. Unlike most mammals of similar size, the American pika is diurnal, being active primarily during the day. It employs two distinct foraging strategies: directly consuming vegetation or gathering and storing plant materials in "haypiles" to sustain itself through the winter months, a behavior known as haying.

Pikas are vocal animals, using a variety of calls and songs both to warn of approaching predators and during the breeding season. Predators of the American pika include eagles, hawks, coyotes, bobcats, foxes, and weasels.

Arabygdi is a village in Vinje Municipality in Telemark county, Norway. The village is located in the Rauland area at the western end of the lake Totak. The Norwegian County Road 362 passes through the village, connecting it to the villages of Haukeli (to the west) and Raulandsgrend (to the east). The road passes through the Urdbøuri scree area, just west of Arabygdi.

The Pywiack Cascade is a waterfall in Yosemite National Park within the U.S. state of California. It is located a few miles downstream from the outlet of Tenaya Lake on Tenaya Creek at the head of the steep and rugged granite gorge, Tenaya Canyon. The waterfall can be viewed from Glacier Point, or by a 6-mile (9.7 km) hike from Olmsted Point, but the canyon is dangerous and the waterfall is unsafe to be reached on foot. The waterfall is highly seasonal. It typically rages in the spring and early summer while shrinking to a trickle by late summer to mid-autumn.

The water of the Pywiack Cascade slides down a steep angle of solid granite, for a total of about 600 feet (180 m). A small waterfall lies directly below the main drop. Below that, the creek continues over jumbled talus for less than a quarter of a mile (0.4 km) before it plunges over another large waterfall. Not much farther downstream is Three Chute Falls whose waters continue on into Mirror Lake and then finally empty into the Merced River, within Yosemite Valley.

The New Zealand rock wren (Xenicus gilviventris) is a small New Zealand wren (family Acanthisittidae) endemic to the South Island of New Zealand. Its Māori names include pīwauwau ("little complaining bird"), mātuitui, and tuke ("twitch", after its bobbing motion). Outside New Zealand it is sometimes known as the rockwren to distinguish it from the unrelated rock wren of North America.

The rock wren is currently restricted to alpine and subalpine areas of the South Island. It is a poor flier and highly terrestrial, feeding in low scrub, open scree, and rockfalls. The rock wren and rifleman are the only two surviving New Zealand wrens; the rock wren's closest relatives were the extinct stout-legged wrens, followed by the extinct bushwren. Its numbers are declining due to predation by introduced mammals.

Rock glaciers are distinctive geomorphological landforms that consist either of angular rock debris frozen in interstitial ice, former "true" glaciers overlain by a layer of talus, or something in between. Rock glaciers are normally found at high latitudes and/or elevations, and may extend outward and downslope from talus cones, glaciers or terminal moraines of glaciers. The early textbook 'Characteristics of Existing Glaciers' refers to the varied, sometimes confusing, names given to these features; 'stone rivers', 'rock flows', 'rock streams' and 'rock glaciers', and includes a map and two photographs of 'rock streams' from the Silverton area of Colorado from the US Geological Surveyors Ernest Howe and W Cross. About the same time, Stephen Capps was surveying in the Wrangell Mountains, Alaska and reported similar landforms in the McCarthy area. Although a variety of names seemed to have be used in the USGS at this time, it is 'rock glacier' that is now generally used.

There are two models of rock glacier formation and flow: permafrost rock glaciers (sometimes termed talus-derived rock glaciers), and glacial rock glaciers, such as the Timpanogos Glacier [40.3847,-111.6415] in Utah, which may be found where glaciers once existed. A rock glacier has formed with rock debris covering a small glacier on Mt. St. Helens [46.2074,-122.1838]. Possible Martian rock glacier features have been identified by the Mars Reconnaissance Orbiter spacecraft. A rock glacier, especially if its origin is unclear, can be considered as a discrete debris accumulation. Rock avalanches can be misidentified as rock glaciers, or may evolve into them.

The Cuillin (Scottish Gaelic: An Cuiltheann) is a range of mostly jagged rocky mountains on the Isle of Skye in Scotland. The main Cuillin ridge is also called the Black Cuillin to distinguish it from the Red Cuillin (na Beanntan Dearga), which lie to the east of Glen Sligachan.

The peaks of the Black Cuillin are mainly composed of gabbro, a very rough igneous rock which provides a superb grip for mountaineers; and basalt, which can be very slippery when wet. The rocks forming the ridge of the Black Cuillin (and outliers such Blà Bheinn) are dark, particularly in the shade, but when in sunlight the Black Cuillin can appear grey to brown. The main ridge forms a narrow crest, with steep cliffs and scree slopes. The ridge is about 14 kilometres (8+1⁄2 miles) long (from Gars-bheinn in the south to Sgùrr nan Gillean in the northeast), and curves in an irregular semi-circle around Loch Coruisk, which lies at the heart of the range. The highest point of the Cuillin, and of the Isle of Skye, is Sgùrr Alasdair in the Black Cuillin at 992 m (3,255 ft).