Geology questions This is a list of recently added questions about geology. Play geology quiz and see all the questions. The hills visible in the picture lie in the Mackenzie delta, in northwestern Canada. What are these terrain forms called?Pingo is a mound of earth-covered ice. Frozen water creates it. These terrain forms are created in areas of long-term permafrost. Most of them lie in the Mackenzie delta.Created by: Binsosvery hard 37% bread rollbread roll1811pingopingo3105fieldfield2583plasneplasne827Alaska riddles » Where is the longest cave in Europe located?In Ukraine. Optymistychna Cave (Ukrainian meaning "optimistic") is a gypsum cave located near the Ukrainian village of Korolivka. Approximately 230 km of passageways have been mapped within. As a result, it is the longest cave in Eurasia, the fifth-longest cave in the world and the longest gypsum cave in the world.Created by: Ninjaivery hard 36% in Francein France14in Switzerlandin Switzerland29in Ukrainein Ukraine43in Sloveniain Slovenia33caves riddles » What type of river is the oued or wadi found in the valleys of North Africa and Arabia?Episodic River. Wadi (or oued) is the Arabic term traditionally referring to a valley. In some instances, it may refer to a dry (ephemeral) riverbed that contains water only during times of heavy rain, a so-called episodic river. Periodic / Non-Perennial Rivers only flow during the rainy season. Exotic Rivers rise in humid areas with high rainfall and flow through dry areas. Created by: Tschukaeasy 72% Exotic RiverExotic River48Perennial riverPerennial river53Episodic RiverEpisodic River526Periodic RiverPeriodic River100deserts riddles » Conviction that "the present is the key to the past"is called?Uniformitarianism is a term used to summarize the idea that the past natural processes bear similarities with today's processes and will keep on that way in future. The term was most utilized in the field of geology although it also applies to other areas.This belief is summarized by the phrase, “the present is the key to the past.”Created by: Tschukahard 58% UniversalismUniversalism40ConservatismConservatism18UniformitarianismUniformitarianism102GlobalismGlobalism14philosophy riddles » What is the name of this type of rock formation located in caves ?Stalactites. A stalactite is a type of formation that hangs from the ceiling of caves, hot springs. A stalagmite is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings. Created by: Tschukaaverage 60% iciclesicicles103stalagmitesstalagmites493stalactitesstalactites964draperydrapery28geography riddles » What is the current geological epoch?Holocene. The Holocen is the youngest, contemporary epoch.The Holocene encompasses the growth and impacts of the human species worldwide, including all its written history, development of major civilizations, and overall significant transition toward urban living in the present. Created by: Tschukahard 53% HoloceneHolocene224OligceneOligcene70PliocenePliocene67MioceneMiocene58Earth riddles » Which of the minerals below shows pleochroism?Alexandrite. Pleochroism is an optical phenomenon in which a substance has different colors when observed at different angles, especially with polarized light. Alexandrite appears greenish in daylight where the full spectrum of visible light is present, and reddish in incandescent light which emits less green and blue spectrum.Created by: Ninjaihard 44% aquamarineaquamarine63bixbitebixbite42alexandritealexandrite132topaztopaz59minerals riddles » When did the course of the Baltic Sea coastline finally form?About 2,000 years ago. The Baltic Sea is one of the largest brackish inland seas by area, and occupies a basin formed by glacial erosion during the last few ice ages. It is about 1,600 km (990 mi) long, an average of 193 km (120 mi) wide, and an average of 55 metres (180 ft) deep. The maximum depth is 459 m (1,506 ft).The current course of the shoreline was formed about 2 thousand years ago. Created by: Tschukavery hard 23% about 5,000 years agoabout 5,000 years ago63about 10,000 years agoabout 10,000 years ago159about 3,500 years agoabout 3,500 years ago112about 2,000 years agoabout 2,000 years ago105Baltic Sea riddles » What is the rarest metal in the Earth's crust?Rhenium is a chemical element with symbol Re It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. Discovered in 1908, rhenium was the second-last stable element to be discovered. It was named after the river Rhine in Europe. Created by: Tschukahard 42% GoldGold317RheniumRhenium1676PlatinumPlatinum1081ZirconiumZirconium838metals riddles » What is the half-time of radiocarbon? (carbon-14)5730 years. Carbon-14, 14C, or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons. Carbon-12 and carbon-13 are both stable, while the half-life of carbon-14 is 5,730 ±40 years. Created by: Tschukahard 51% 5 years5 years33757 years57 years816573 years573 years7185730 years5730 years1999chemical elements riddles » Play geology quiz and see all the questions.