Вуд округының географиялық және геологиялық сипаттамасы

County in Wisconsin, United States

According to the U. S. Census Bureau, the county has a total area of 809 square miles (2,095 km2), of which 793 square miles (2,054 km2) is land and 16 square miles (41 km2) (2.0%) is water. The geographic center of Wisconsin is in Wood County, nine miles southeast of Marshfield. Wood County spans two of Wisconsin's five geographical regions. The northern part of the county is in the Northern Highlands, with mostly rich cropland with heavy clay soil, used for corn, soybeans, hay and dairy. In the northwest corner the Marshfield moraine runs from Marathon County through Marshfield, Bakerville and Nasonville into Clark County. The south and central areas from Babcock through Cranmoor and Wisconsin Rapids are in the Central Plain, flat and marshy one of the major cranberry producing centers of the United States. driving several power dams. The remainder of the county is drained by smaller streams and rivers, punctuated by isolated hills like Powers Bluff. The flat, sandy southern third of the county was largely shaped by the last glacial advance. The ice didn't reach Wood County, but it approached from the east into Portage County and butted up against the Baraboo Hills to the south. This blocked the Wisconsin River, damming it so that it backed up, forming Glacial Lake Wisconsin, a frigid lake that stretched from the Baraboo Hills north to the sites of Babcock and Wisconsin Rapids, submerging that part of the county. This area is generally flat and marshy now because meltwater rivers from the glacier and streams from land to the north carried sand and silt out into the glacial lake, where the sediment settled beneath its still waters. After the glacial dam melted enough to drain Glacial Lake Wisconsin around 13,000 years ago, the Wisconsin River cut new channels through the lake bottom sands in the southeast corner of the county. In a later dry period, wind blew the sand into dunes. One dune in the town of Saratoga is eight meters thick. Later still, the area became wet and peat formed in places on top of the sand.</blockquote>

The north of the county was shaped by earlier glaciers, which deposited glacial till, the basis for the heavy soil there. The Marshfield moraine in the northwest corner is probably a terminal moraine from one of these earlier glaciers, or from a series of them. Its age is unclear, but its relatively smooth surface indicates that it has eroded for a much longer time than the choppy terminal moraines left 13,000 years ago, Most of the original sandstone layer has been eroded away and the remainder is usually buried under glacial till, but it can be seen in gravel pits and a few bluffs. The Lindsey bluffs (a. k. a. the Marshfield School Forest) and Birch Bluff and South Bluff in the Town of Remington are hard spots in this sandstone which have resisted erosion.

As of the census of 2000, there were 75,555 people, 30,135 households, and 20,491 families residing in the county. The population density was There were 31,691 housing units at an average density of The racial makeup of the county was 96.43% White, 0.27% Black or African American, 0.70% Native American, 1.61% Asian, 0.01% Pacific Islander, 0.30% from other races, and 0.69% from two or more races. 0.94% of the population were Hispanic or Latino of any race. 50.8% were of German, 8.5% Polish, 6.2% Norwegian, 5.2% American and 5.1% Irish ancestry. There were 30,135 households, out of which 32.20% had children under the age of 18 living with them, 56.70% were married couples living together, 8.00% had a female householder with no husband present, and 32.00% were non families. 27.20% of all households were made up of individuals, and 11.40% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.01. In the county, the population was spread out, with 25.70% under the age of 18, 7.70% from 18 to 24, 28.40% from 25 to 44, 22.90% from 45 to 64, and 15.30% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 96.10 males. For every 100 females age 18 and over, there were 93.00 males. In 2017, there were 843 births, giving a general fertility rate of 69.1 births per 1000 women aged 15–44, the 19th highest rate out of all 72 Wisconsin counties. Of these, 16 of the births occurred at home. Additionally, there were 59 reported induced abortions performed on women of Wood County residence in 2017, a figure higher than the records for the preceding four years.

Wood County has a 19 member board of supervisors, each member representing a district.