quartzite
Quartzite is a metamorphic rock mainly composed of quartz (with a quartz content greater than 85%), formed by metamorphic processes of quartz sandstone and siliceous rocks. It is generally formed by regional metamorphism and recrystallization of quartz sandstone or other siliceous rocks. It is also possible that siliceous rocks near magma undergo thermal contact metamorphism to form quartzite. Common colors include green, gray, yellow, brown, orange red, white, blue, purple, red, etc.
Sandstone
Sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Volcanic breccia
Volcanic breccia is a conglomerate formed by volcanic activity with angular and sub angular gravel content>50%. The diameter is generally greater than 4 millimeters, and the lava fragments contained are mostly tuff, with fewer glass fragments and whole stones. It is mainly composed of volcanic breccia with a particle size of 2-64 millimeters, and also contains breccia from other rocks and a small amount of mineral crystal fragments such as quartz and feldspar.
Sandstone
Sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Tuff
Tuff: It is a type of volcanic debris rock, composed of volcanic debris material with more than 50% of particles with a diameter less than 2 millimeters. The main component is volcanic ash, with a loose, rough or dense appearance. Layered tuff is called layered tuff; Due to different ingredients, the colors are diverse, including purple red, gray white, gray green, etc.
Sandstone
Sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Sandstone
Sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Sandstone
Sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Sandstone
Sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Sandstone
Sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Coarse grained sandstone
Coarse grained sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 2 to 1mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Medium grained sandstone
Sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
Feldspar sandstone
Feldspathic sandstone is a sedimentary rock mainly composed of various sand particles cemented together, with particle diameters ranging from 0.05-2mm. The sand content should be greater than 50%, and the structure is stable. It usually appears light brown or red and mainly contains silicon, calcium, clay, and iron oxide. The vast majority of sandstone is composed of quartz or feldspar.
A rock pile covered in moss
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Rock paintings captured by drones in the Mojave Desert of California.
Rocks of the Matanuska Glacier in Alaska
Matanuska Glacier is a valley glacier located in Alaska, United States. 27 miles (43 kilometers) long and 4 miles (6.4 kilometers) wide, it is the largest glacier that can be reached by car in the United States. Its glacier terminus is the source of the Matanuska River. It is located near Glenn Highway, about 100 miles (160 kilometers) northeast of Anchorage. The Matanuska Glacier has a daily flow of approximately 1 foot (30 centimeters). Due to the melting of glaciers in lower areas, as of 2007, there has been little change in the position of glacier tips over the past 30 years.
Rocks of the Matanuska Glacier in Alaska
Matanuska Glacier is a valley glacier located in Alaska, United States. 27 miles (43 kilometers) long and 4 miles (6.4 kilometers) wide, it is the largest glacier that can be reached by car in the United States. Its glacier terminus is the source of the Matanuska River. It is located near Glenn Highway, about 100 miles (160 kilometers) northeast of Anchorage. The Matanuska Glacier has a daily flow of approximately 1 foot (30 centimeters). Due to the melting of glaciers in lower areas, as of 2007, there has been little change in the position of glacier tips over the past 30 years.
Rocks of the Matanuska Glacier in Alaska
Matanuska Glacier is a valley glacier located in Alaska, United States. 27 miles (43 kilometers) long and 4 miles (6.4 kilometers) wide, it is the largest glacier that can be reached by car in the United States. Its glacier terminus is the source of the Matanuska River. It is located near Glenn Highway, about 100 miles (160 kilometers) northeast of Anchorage. The Matanuska Glacier has a daily flow of approximately 1 foot (30 centimeters). Due to the melting of glaciers in lower areas, as of 2007, there has been little change in the position of glacier tips over the past 30 years.
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