Breccia is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix.
The Tswana are a bantu ethnic group native to Southern Africa. Ethnic Tswana made up approximately 85% of the population of Botswana in 2011.
The Witwatersrand is a 56-kilometre-long (35 mi), north-facing scarp in South Africa. It consists of a hard, erosion-resistant quartzite metamorphic rock, over which several north-flowing rivers form waterfalls, which account for the name Witwatersrand, meaning "white water ridge" in Afrikaans. This east-west-running scarp can be traced with only one short gap, from Bedfordview in the east, through Johannesburg and Roodepoort, to Krugersdorp in the west.
The Richat Structure, also called Guelb er Richât is a prominent circular geological feature in the Sahara's Adrar Plateau, near Ouadane, west–central Mauritania, Northwest Africa. In the local dialect, rīšāt means feathers and it also is known locally in Arabic as tagense. Tagense refers to the circular opening of the leather pouch used to draw water from local wells.
The Sudbury Basin, also known as Sudbury Structure or the Sudbury Nickel Irruptive, is a major geological structure in Ontario, Canada. It is the third-largest known impact crater or astrobleme on Earth, as well as one of the oldest. The crater was formed 1.849 billion years ago in the Paleoproterozoic era.
Roter Kamm is a meteorite crater, located in the Sperrgebiet, within the Namibian section of the Namib Desert, approximately 80 kilometres (50 mi) north of Oranjemund and 12 kilometres (7.5 mi) southwest of Aurus Mountain in the ǁKaras Region. The crater is 2.5 kilometres (1.6 mi) in diameter and is 130 metres (430 ft) deep. The age is estimated at 4.81 ± 0.5 Ma, placing it in the Pliocene. The crater is exposed at the surface, but its original floor is covered by sand deposits at least 100 metres (330 ft) thick.
The Vredefort impact structure is one of the largest verified impact structures on Earth. The crater, which has since been eroded away, has been estimated at 170–300 kilometres (110–190 mi) across when it was formed. The remaining structure, comprising the deformed underlying bedrock, is located in present-day Free State province of South Africa. It is named after the town of Vredefort, which is near its centre. The structure's central uplift is known as the Vredefort Dome. The impact structure was formed during the Paleoproterozoic Era, 2.023 billion years ago. It is the second-oldest known impact structure on Earth, after Yarrabubba.
The Manson crater is an impact crater near the site of Manson, Iowa where an asteroid or comet nucleus struck the Earth during the Cretaceous Period, approximately 74 Ma. It was one of the largest known impact events to have happened in North America. Previously it was thought to have led to the extinction of the dinosaurs until isotopic ages proved that it was too old.
Bothaville is a maize farming town situated near the Vaal River in the Lejweleputswa DM of the Free State province, South Africa. It is situated 60 km east of the Vaal, on the bank of its Vals River tributary. Bothaville and the adjacent Kgotsong township have a total of approximately 46,000 residents.
Belfast is a small town in Mpumalanga Province, South Africa. It is situated in the eMakhazeni Local Municipality in the Nkangala District Municipality.
White River is a small holiday and farming town situated just north of Mbombela in Mpumalanga, South Africa. The farms in the region produce tropical fruits, macadamia nuts, vegetables, flowers and timber. As of 2011, White River had a population of 16,639.
Ottosdal is a small town situated at an altitude of 1,479 meters on the branch railway line from Makwassie in the central North West Province of South Africa. Ottosdal is a farming community engaged in the growing of grains such as maize (mielies), sunflower and peanuts. In addition, local farmers raise cattle, sheep, pigs, dairy cows and chicken. A major pyrophyllite mine lies near it on the farm Gestoptefontein. This town originated from the establishment of a Dutch Reformed Church parish in 1913. To this was added a church building on Korannafontein, the farm of Gerhardus Petrus Otto. The town is known as the birthplace of "Die Baas", who was born there in 1952. Ottosdal grew around the church and was officially registered in 1917 and named after G. P. Otto.
Vryburg is a large agricultural town with a population of 48,400 situated in the Dr Ruth Segomotsi Mompati District Municipality of the North West Province of South Africa. It is the seat and the industrial and agricultural heartland of the district of the Bophirima region.
The Puget Sound faults under the heavily populated Puget Sound region of Washington state form a regional complex of interrelated seismogenic (earthquake-causing) geologic faults. These include the:
Alexander Colin Campbell was an archaeologist and museum curator in Botswana. He was Emeritus Director of Botswana's Department of Wildlife and National Parks and National Monuments.
The Battle of Dimawe was fought between several Batswana tribes and the Boers in August 1852. Under the command of Kgosi Setshele I of the Bakwena tribe, the Batswana were victorious at Dimawe Hill.
The Bangui magnetic anomaly is a local variation in the Earth's magnetic field centered at Bangui, the capital of the Central African Republic. The magnetic anomaly is roughly elliptical, about 700 km × 1,000 km, and covers most of the country, making it one of the "largest and most intense crustal magnetic anomalies on the African continent". The anomaly was discovered in the late 1950s, explored in the 1970s, and named in 1982. Its origin remains unclear.
Hargraves is a Hesperian-age complex double-layered ejecta impact crater on Mars. It was emplaced near the crustal dichotomy in the vicinity of the Nili Fossae, the Syrtis Major volcanic plains, and the Isidis impact basin, and is situated within the Syrtis Major quadrangle. Hargraves has been the target of focused study because its ejecta apron is particularly well-preserved for a Martian crater of its size. It has been analogized to similar double-layered ejecta blankets on Earth, including that of the Ries impact structure, which was where the conceptual model for how such craters formed was first advanced.
The Maniitsoq structure was a proposed 3 billion-year-old impact structure located in the Akia terrane of the North Atlantic Craton, centred about 55 km (34 mi) south-east of the town of Maniitsoq, Greenland, at 65°15′N51°50′W. However, the Maniitsoq structure has not been widely recognised as an impact structure, and the proposal was criticised for not meeting established criteria for recognising impact craters. Furthermore, subsequent studies in the region have demonstrated that there is no evidence for an impact structure, and in fact a number of observations directly contradict the earlier impact structure proposals. The Maniitsoq structure is not recognised as an impact structure by the Earth Impact Database.
