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Simplified map of Iowa Bedrock formations of Iowa The geography of Iowa includes the study of bedrock, landforms, rivers, geology, paleontology and urbanisation of the U.S. state of Iowa . The state covers an area of 56,272.81 sq mi (145,746 km 2 ).
1911 map showing extent of the Driftless Area as well as the Driftless region in Minnesota and Iowa Typical terrain of the Driftless Area as viewed from Wildcat Mountain State Park in Vernon County, Wisconsin Glacial map of the Great Lakes region; the dark area near left center was not covered by drift. Areas with diagonal hatching were ...
Originally known as King's Park, the area approximately 5.5 miles west of Yale was designated as one of the first of Iowa's state parks in 1926 by the Iowa Conservation Board. [4] Beginning in 1933 and continuing during the 1930s the Civilian Conservation Corps constructed many of the facilities at Springbrook which are on the National Register ...
Upland sinkholes contribute to the air flow regime and are an important component of a unique system called an algific talus slopes, meaning a cold producing rocky slope. Even on a midsummer day when the outside air temperature is 90 °F (32 °C), ground temperatures on these slopes range from 42 °F (6 °C) to about 55 °F (13 °C).
Sinkholes can range in size from a few feet wide to hundreds of acres, and anywhere from 1 to 100 feet or more deep. Sinkholes can swallow up cars, parts of roads and even houses.
2018 Surabaya City sinkhole – a 30 m (98 ft) wide and 15 m (49 ft) deep sinkhole opened up on Gubeng Road in Surabaya, Indonesia during construction work on December 18, 2018. 2022 Tierra Amarilla sinkhole – a 25 m (80 ft) wide and more than 200 m (700 ft) deep sinkhole appeared in the commune of Tierra Amarilla , Atacama Region of Chile ...
A second sinkhole has appeared in the street, with a car teetering on the brink. ... said a quarry marked "sand pit" can be seen on 19th century maps of land directly under the sinkhole.
Spook Cave is a flooded cave located about seven miles (11 km) 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. [1]