The Canadian Shield, also called the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton, the ancient geologic core of the North American continent. Glaciation has left the area with only a thin layer of soil, through which exposures of igneous bedrock resulting from its long volcanic history are frequently visible. As a deep, common, joined bedrock region in eastern and central Canada, the shield stretches north from the Great Lakes to the Arctic Ocean, covering over half of Canada and most of Greenland; it also extends south into the northern reaches of the United States.
Russia is the largest country in the world, covering over 17,125,192 km2 (6,612,074 sq mi), and encompassing more than one-eighth of Earth's inhabited land area. Russia extends across eleven time zones, and has the most borders of any country in the world, with sixteen sovereign nations.
Venezuela is a country in South America, bordering the Caribbean Sea and the North Atlantic Ocean, between Colombia and Guyana. It is situated on major sea and air routes linking North and South America. Located at the northernmost end of South America, Venezuela has a total area of 912,050 km2 (352,140 sq mi) and a land area of 882,050 km2 (340,560 sq mi). It is the 32nd largest country and is slightly smaller than Egypt, or half the size of Mexico. Shaped roughly like an inverted triangle, the country has a 2,800 km (1,700 mi) long coastline. It is bound on the north by the Caribbean Sea and the Atlantic Ocean, on the east by Guyana, on the south by Brazil, and on the west by Colombia. It has the 55th largest Exclusive Economic Zone of 471,507 km2 (182,050 sq mi). Its maritime territory borders Trinidad and Tobago, Dominica, the Dominican Republic, Grenada, St. Kitts and Nevis, St. Vincent and the Grenadines, France, the United Kingdom, the Netherlands, and the United States. Venezuela also claims the region of Guayana Esequiba, currently under the control of Guyana.
The Geography of Guyana comprises the physical characteristics of the country in Northern South America and part of Caribbean South America, bordering the North Atlantic Ocean, between Suriname and Venezuela, with a land area of approximately 214,969 square km. The country is situated between 1 and 9 north latitude and between 56 and 62 west longitude. With a 459 km (285 mi)-long Atlantic coastline on the northeast, Guyana is bounded by Venezuela on the west, Brazil on the west and south, and Suriname on the east.
The Guiana Shield is one of the three cratons of the South American Plate. It is a 1.7 billion-year-old Precambrian geological formation in northeast South America that forms a portion of the northern coast. The higher elevations on the shield are called the Guiana Highlands, which is where the table-like mountains called tepuis are found. The Guiana Highlands are also the source of some of the world's most well-known waterfalls such as Angel Falls, Kaieteur Falls and Cuquenan Falls.
Goat Rocks is an extinct stratovolcano in the Cascade Range, located between Mount Rainier and Mount Adams in southern Washington, in the United States. Part of the Cascade Volcanoes, it was formed by the subduction of the Juan de Fuca Plate under the western edge of the North American Plate. The volcano was active from 3.2 million years ago until eruptions ceased between 1 and 0.5 million years ago. Throughout its complex eruptive history, volcanism shifted from silicic explosive eruptions to voluminous, mafic activity.
The Cuyuni River is a South American river and a tributary of the Essequibo River. It rises in the Guiana Highlands of Venezuela, where it descends northward to El Dorado, and turns eastward to meander through the tropical rain forests of the Cuyuni-Mazaruni Region of Guyana. It finally turns southeastward, flowing to its confluence with the Mazaruni River.
The Acarai Mountains are a wet, forested highland region of low mountains located in the southern part of Guyana. This range lies along the common border between Guyana and Brazil. The Acarai Mountains is one of four mountain ranges in Guyana, the others being the Imataka, Kanuku and Pakaraima mountains. The headwaters of the Essequibo River, the longest river in Guyana, and the Courantyne River, have their sources in this range. The actual source of the Essequibo was discovered in 2013 by a Guyanese-German team. The mountain range was first mentioned in 1821 by A.H. Brué as Sierra do Acaray.
The Mazaruni River is a tributary of the Essequibo River in northern Guyana. Its source is in the remote western forests of the Pakaraima Mountains and its confluence with the Cuyuni River is near Bartica. As it descends from the Guiana Highlands the river runs south-east, past Issano, then northward to Bartica. The river is a source of alluvial gold.
The Pomeroon River is located in Guyana, South America, situated between the Orinoco and the Essequibo rivers. The area has long been inhabited by Lokono people. The Pomeroon River is also one of the deepest rivers in Guyana.
Imbaimadai is a community in the Cuyuni-Mazaruni Region of Guyana.
The Guayana Region is an administrative region of eastern Venezuela.
The Barima River is a tributary of the Orinoco River, entering 6 kilometres (4 mi) from the Atlantic Ocean. It originates from the Imataka Mountains in Guyana, flowing for approximately 340 kilometres (210 mi) before entering Venezuela about 80 kilometres (50 mi) from its mouth.
The Barama River is a tributary of the Waini River, both being in the Barima-Waini administrative region of Guyana.
The Akaiwang River is a tributary of the Wenamu River in the Cuyuni-Mazaruni region of Guyana.
Needle Rock Natural Area is located at the western edge of the West Elk Mountains of Colorado. The surrounding terrain is characterized by laccolithic mountains flanked by precipitous cliffs, extensive talus aprons, forested mesas, canyons, and spacious, well-watered intermontane basins. Needle Rock is an intrusive plug of monzonite porphyry cropping out 3.5 miles (5.6 km) east-northeast of the Town of Crawford in Delta County, Colorado, United States. With an elevation of 7,797 feet (2,377 m), the towering rock spire stands 800 feet (240 m) tall above the floor of the Smith Fork of the Gunnison River valley. The massive rock feature originated in the Oligocene geological epoch when magma intruded between existing sedimentary rocks as the crown of a buried laccolith or possibly the underlying conduit of a laccolith. Subsequent erosion has exposed the prominent rock formation seen in the natural area today.
The Toroparu mine is estimated to be one of the largest gold mining projects in Guyana. The mine is located in the north-west of the country in Cuyuni-Mazaruni. The mine has estimated reserves of 6 million oz of gold.
Guyana Goldfields was a Canadian company that owned and operated the Aurora gold mine in Guyana. Before being acquired by Zijin Mining in 2020, Guyana Goldfields was a publicly traded company with shares listed on the Toronto Stock Exchange and previously TSX Venture Exchange. Beginning in 1996 the company acquired exploration rights to the former Peters and Aurora mines with the objective of utilizing modern exploration technology to re-evaluate the potential gold reserves. Following positive exploratory results, the company received financing from the International Finance Corporation and other investors and conducted economic and technical feasibility studies. The Aurora gold mine began commercial production in 2015 and has produced approximately 125,000 to 160,000 ounces of gold per year from the mine since then. These lower than expected results and a revised technical study that significantly lowered the recoverable reserves estimates, led to the removal of the CEO and directors involved in making the investment decision and a class action lawsuit alleging misrepresentations in public disclosures.
Issano is a village of Cuyuni-Mazaruni, Guyana. It's located along the Mazaruni River, and is a hub for mining.
