Rocks in the grassland
Granite porphyry
Granite porphyry belongs to acidic rocks and is variegated; Spotted structure; Blocky structure; The main mineral composition is potassium feldspar and quartz. The mineral composition of granite porphyry is the same as that of the corresponding plutonic rock - granite, but it has a porphyritic structure, indicating that it is a shallow plutonic rock.
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.
Surface granite
Granite belongs to intrusive rocks in acidic (SiO2>66%) magmatic rocks, which is the most common type of rock in this category, mostly in light flesh red, light gray, gray white, etc. Medium coarse grain, fine grain structure, blocky structure. There are also some structures such as speckled structures, spherical structures, and gneiss like structures. The main minerals are quartz, potassium feldspar, and acid plagioclase, while the secondary minerals are biotite, amphibole, and sometimes a small amount of pyroxene. There are many types of accessory minerals, including magnetite, garnet, zircon, apatite, tourmaline, fluorite, etc. Quartz content is the highest among various magmatic rocks, ranging from 20% to 50%.
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.
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
Small Landscape Courtyard Stone Mountain
Rocks in the Fountain Zone of Colorado
This is part of the Fountain Zone in Colorado and is an iconic rock.
British Museum, London A boulder with petroglyphs
A boulder with a picture of a man on it. Found in the fourth waterfall of Sudan. It is now in the British Museum in London.
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