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Spook Cave
Spook Cave is a flooded cave located about west of McGregor in rural Clayton County, Iowa. It is privately owned and operated as a tourist attraction offering escorted boat rides into the cave. The cave was first discovered in 1953 and opened for business in 1955. The cave entrance is located on a property that also includes a campground and cabins. The cave is in the drainage of Bloody Run Creek, a small tributary of the Upper Mississippi River. A lock and dam maintain water levels sufficient for boat access; the cave's stream is allowed to drain to its natural, shin-high depth during the winter. Geologically, the cave is in the Driftless Area of Iowa, a region characterized by karst topography, caves, sinkhole A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are locally also known as ''vrtače'' and shakeholes, and to openi ...s, disappearing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McGregor, Iowa
McGregor is a city in Clayton County, Iowa, United States. The population was 742 at the time of the 2020 census. McGregor is located on the Mississippi River across from Prairie du Chien, Wisconsin. Pike's Peak State Park is located just south of the city. Just to the north of McGregor is the city of Marquette. The community of McGregor Heights lies in the southern parts of the city limits. History McGregor was founded as MacGregor's Landing in 1847 by Alexandar MacGregor, a descendant of Rob Roy MacGregor, and the area around MacGregor's Landing was settled by the extended family. In 1849 it was reported that the original MacGregor seal and signet were owned by Alex MacGregor. The Scots Gaelic clan seal was inscribed, "S' Riogal Mo Dhream/ Een dhn bait spair nocht", which was interpreted as "Royalty is my race / End do and spare not". The signet was a bloodstone from Loch Lomond, and was sketched by William Williams. Since 1837, MacGregor had been operating a ferry acros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clayton County, Iowa
Clayton County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 17,043. Its county seat is Elkader. The county was established in 1837 and was named in honor of John M. Clayton, United States Senator from Delaware and later Secretary of State under President Zachary Taylor. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (1.8%) is water. It is the fifth-largest county in Iowa by area. Adjacent counties *Allamakee County (north) *Crawford County, Wisconsin (northeast) *Grant County, Wisconsin (east) * Dubuque County (southeast) * Delaware County (south) * Buchanan County (southwest) * Fayette County (west) * Winneshiek County (northwest) Major highways * U.S. Highway 18 * U.S. Highway 52 * Iowa Highway 3 * Iowa Highway 13 * Iowa Highway 56 * Iowa Highway 76 * Iowa Highway 128 National protected areas * Driftless Area National Wildlife Refuge (part) * Effigy Mounds Nation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bloody Run (Iowa)
Bloody Run is a creek tributary to the East Fork Des Moines River. It flows through Humboldt County, Iowa. It enters the East Fork Des Moines north of Humboldt, Iowa Humboldt is a city in Humboldt County, Iowa, United States. The population was 4,792 at the time of the 2020 census, gaining 340 people over the 2000 total. History Frank A. Gotch Park (just south of present-day Humboldt and Dakota City) was a .... See also * List of rivers of Iowa References Tributaries of the Mississippi River Rivers of Clayton County, Iowa Rivers of Iowa {{ClaytonCountyIA-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Mississippi River
The Upper Mississippi River is the portion of the Mississippi River upstream of St. Louis, Missouri, United States, at the confluence of its main tributary, the Missouri River. History In terms of geologic and hydrographic history, the Upper Mississippi east and south of Fort Snelling is a portion of the now-extinct Glacial River Warren which carved the valley of the Minnesota River, permitting the immense Glacial Lake Agassiz to join the world's oceans at the Gulf of Mexico. The collapse of ice dams holding back Glacial Lake Duluth and Glacial Lake Grantsburg carved out the Dalles of the St. Croix River at Interstate Park. The Upper Mississippi River valley likely originated as an ice-marginal stream during the Pre-Illinoian Stage. The Driftless Area is a portion of North America left unglaciated at that ice age's height, hence not smoothed out or covered over by previous geological processes. Inasmuch as the Wisconsin glaciation formed lobes that met (and blocked) wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Driftless Area
The Driftless Area, a topographical and cultural region in the American Midwest, comprises southwestern Wisconsin, southeastern Minnesota, northeastern Iowa, and the extreme northwestern corner of Illinois. Never covered by ice during the last ice age, the area lacks the characteristic glacial deposits known as drift. Its landscape is characterized by steep hills, forested ridges, deeply carved river valleys, and karst geology with spring-fed waterfalls and cold-water trout streams. Ecologically, the Driftless Area's flora and fauna are more closely related to those of the Great Lakes region and New England than those of the broader Midwest and central Plains regions. The steep riverine landscape of both the Driftless Area proper and the surrounding Driftless-like region are the result of early glacial advances that forced preglacial rivers that flowed into the Great Lakes southward, causing them to carve a gorge across bedrock cuestas, thereby forming the modern incised upper Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karst Topography
Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions. Subterranean drainage may limit surface water, with few to no rivers or lakes. However, in regions where the dissolved bedrock is covered (perhaps by debris) or confined by one or more superimposed non-soluble rock strata, distinctive karst features may occur only at subsurface levels and can be totally missing above ground. The study of ''paleokarst'' (buried karst in the stratigraphic column) is important in petroleum geology because as much as 50% of the world's hydrocarbon reserves are hosted in carbonate rock, and much of this is found in porous karst systems. Etymology The English word ''karst'' was borrowed from German in the late 19th century, which entered German much earlier. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave
A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground. The word ''cave'' can refer to smaller openings such as sea caves, rock shelters, and grottos, that extend a relatively short distance into the rock and they are called ''exogene'' caves. Caves which extend further underground than the opening is wide are called ''endogene'' caves. Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called ''caving'', ''potholing'', or ''spelunking''. Formation types The formation and development of caves is known as ''speleogenesis''; it can occur over the course of millions of years. Caves can range widely in size, and are formed by various geological processes. These may involve a combination of chemical processes, erosion by water, tectonic forces, microorgani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinkhole
A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are locally also known as ''vrtače'' and shakeholes, and to openings where surface water enters into underground passages known as ''ponor'', swallow hole or swallet. A ''cenote'' is a type of sinkhole that exposes groundwater underneath. A ''sink'' or ''stream sink'' are more general terms for sites that drain surface water, possibly by infiltration into sediment or crumbled rock. Most sinkholes are caused by karst processes – the chemical dissolution of carbonate rocks, collapse or suffosion processes. Sinkholes are usually circular and vary in size from tens to hundreds of meters both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found worldwide. Formation Natural processes Sinkholes may capture surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Losing Stream
A losing stream, disappearing stream, influent stream or sinking river is a stream or river that loses water as it flows downstream. The water infiltrates into the ground recharging the local groundwater, because the water table is below the bottom of the stream channel. This is the opposite of a more common ''gaining stream'' (or ''effluent stream'') which increases in water volume farther downstream as it gains water from the local aquifer. Losing streams are common in arid areas due to the climate which results in huge amounts of water evaporating from the river generally towards the mouth. Losing streams are also common in regions of karst topography where the streamwater may be completely captured by a cavern system, becoming a subterranean river. Examples There are many natural examples of subterranean rivers including: Bosnia and Herzegovina * Unac; Mušnica-Trebišnjica- Krupa/Ombla (Trebišnjica is considered to be one of the largest sinking rivers in the world; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caves Of Iowa
A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground. The word ''cave'' can refer to smaller openings such as sea caves, rock shelters, and grottos, that extend a relatively short distance into the rock and they are called ''exogene'' caves. Caves which extend further underground than the opening is wide are called ''endogene'' caves. Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called ''caving'', ''potholing'', or ''spelunking''. Formation types The formation and development of caves is known as ''speleogenesis''; it can occur over the course of millions of years. Caves can range widely in size, and are formed by various geological processes. These may involve a combination of chemical processes, erosion by water, tectonic forces, microorganisms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of Clayton County, Iowa
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are the fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Show Caves In The United States
Show or The Show may refer to: Competition, event, or artistic production * Agricultural show, associated with agriculture and animal husbandry * Animal show, a judged event in the hobby of animal fancy ** Cat show ** Dog show ** Horse show ** Specialty show, a dog show which reviews a single breed *Show, an artistic production, such as: ** Concert ** Radio show ** Talk show ** Television show ** Theatre production * Trade fair or trade show Arts, entertainment, and media Films * ''The Show'' (1922 film), starring Oliver Hardy * ''The Show'' (1927 film), directed by Tod Browning * ''The Show'' (1995 film), a hip hop documentary * ''The Show'' (2017 film), an American satirical drama * ''The Show'' (2020 film), a British mystery film Album * ''Show'' (The Cure album), 1993 * ''Show'' (The Jesus Lizard album), 1994 * ''The Show'' (album), a 2008 album by eMC Songs * "The Show" (Doug E. Fresh song) * "The Show" (Girls Aloud song) * "The Show" (Lenka song) * "The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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