The Wisconsin Glacial Episode, also called the Wisconsin glaciation, was the most recent glacial period of the North American ice sheet complex. This advance included the Cordilleran Ice Sheet, which nucleated in the northern North American Cordillera; the Innuitian ice sheet, which extended across the Canadian Arctic Archipelago; the Greenland ice sheet; and the massive Laurentide Ice Sheet, which covered the high latitudes of central and eastern North America. This advance was synchronous with global glaciation during the last glacial period, including the North American alpine glacier advance, known as the Pinedale glaciation. The Wisconsin glaciation extended from approximately 75,000 to 11,000 years ago, between the Sangamonian Stage and the current interglacial, the Holocene. The maximum ice extent occurred approximately 25,000–21,000 years ago during the last glacial maximum, also known as the Late Wisconsin in North America.
The Last Glacial Period (LGP), also known colloquially as the Last Ice Age or simply Ice Age, occurred from the end of the Last Interglacial to the end of the Younger Dryas, encompassing the period c. 115,000 – c. 11,700 years ago.
The Passaic River is a river, approximately 80 miles (130 km) long, in Northern New Jersey. The river in its upper course flows in a highly circuitous route, meandering through the swamp lowlands between the ridge hills of rural and suburban northern New Jersey, called the Great Swamp, draining much of the northern portion of the state through its tributaries.
The Great Falls of the Passaic River is a prominent waterfall, 77 feet (23 m) high, on the Passaic River in the city of Paterson in Passaic County, New Jersey. The falls and surrounding area are protected as part of the Paterson Great Falls National Historical Park, administered by the National Park Service. The Congress authorized its establishment in 2009.
The Watchung Mountains are a group of three long low ridges of volcanic origin, between 400 and 500 feet high, lying parallel to each other in northern New Jersey in the United States. The name is derived from the American Native Lenape name for them, Wach Unks. In the 18th century, the Euro-American settlers also called them the Blue Mountains or Blue Hills. The Watchung Mountains are known for their numerous scenic vistas overlooking the skylines of New York City and Newark, New Jersey, as well as their isolated ecosystems containing rare plants, endangered wildlife, rich minerals, and globally imperiled trap rock glade communities. The ridges traditionally contained the westward spread of urbanization, forming a significant geologic barrier beyond the piedmont west of the Hudson River; the town of Newark, for example, once included lands from the Hudson to the base of the mountains. Later treaties moved the boundary to the top of the mountain, to include the springs.
In geology, a proglacial lake is a lake formed either by the damming action of a moraine during the retreat of a melting glacier, a glacial ice dam, or by meltwater trapped against an ice sheet due to isostatic depression of the crust around the ice. At the end of the last ice age about 10,000 years ago, large proglacial lakes were a widespread feature in the northern hemisphere.
Hatfield Swamp is a fresh water wetland area in the U.S. state of New Jersey, forming what might be considered the "second bank" of the Passaic River between Morris and Essex counties.
Goffle Brook is a tributary of the Passaic River which flows south through a section of Passaic County and Bergen County in New Jersey and drains the eastern side of the First Watchung Mountain. Heading up the brook from the confluence with the Passaic River, one encounters the borough of Hawthorne, the village of Ridgewood, the borough of Midland Park, and the township of Wyckoff.
Lake Chicago was a prehistoric proglacial lake that is the ancestor of what is now known as Lake Michigan, one of North America's five Great Lakes. Formed about 13,000 years ago and fed by retreating glaciers, it drained south through the Chicago Outlet River.
Lake Maumee was a proglacial lake and an ancestor of present-day Lake Erie. It formed about 17,500 calendar years, or 14,000 Radiocarbon Years Before Present (RCYBP) as the Huron-Erie Lobe of the Laurentide Ice Sheet retreated at the end of the Wisconsin glaciation. As water levels continued to rise the lake evolved into Lake Arkona and then Lake Whittlesey.
Campgaw Mountain is the northernmost ridge of the volcanically formed Watchung Mountains, along the border of Franklin Lakes, Oakland, and Mahwah in Bergen County, New Jersey, United States. Located almost entirely within the bounds of Campgaw Mountain Reservation, the mountain offers numerous outdoor recreational opportunities, including the only ski slope in the Watchungs. Campgaw Mountain is commonly considered to be part of the greater Ramapo Mountains region, but the flora and geology of the mountain is quite different from the surrounding area and more closely resembles the nearby Preakness Range to the south.
New Jersey is a very geologically and geographically diverse region in the United States' Middle Atlantic region, offering variety from the Appalachian Mountains and the Highlands in the state's northwest, to the Atlantic Coastal Plain region that encompasses both the Pine Barrens and the Jersey Shore. The state's geological features have impacted the course of settlement, development, commerce and industry over the past four centuries.
The Valparaiso Moraine is a recessional moraine that forms an immense U around the southern Lake Michigan basin in North America. It is a band of hilly terrain composed of glacial till and sand. The Valparaiso Moraine defines part of the continental divide known as the Saint Lawrence River Divide, bounding the Great Lakes Basin. It begins near the border of Wisconsin and Illinois and extends south through Lake, McHenry, Cook, DuPage and Will counties in Illinois, and then turns southeast, going through northwestern Indiana. From this point, the moraine curves northeast through Lake, Porter, and LaPorte counties of Indiana into Michigan. It continues into Michigan as far as Montcalm County.
The Lenape Trail is a trail through Essex County, connecting many county parks and reservations, wooded spaces, and historical sites. It begins in Newark, New Jersey and ends in Millburn, New Jersey. It was established in 1982. It is the fifth longest trail in the state behind the Delaware and Raritan Canal Trail, the Appalachian Trail, the completed section of the Highlands Trail in the state and the Batona Trail. The Lenape trail traverses Newark and its suburbs, as well as the Watchung Mountains and Passaic Meadows. Because of the steepness of the Watchung Mountains and the flood-prone nature of the Passaic Meadows, the former basin of Glacial Lake Passaic, these areas have remained much less developed than the rest of the northeastern part of the state. This trail therefore offers hikers an opportunity to see cultural and historical sites of an urban trail, as well as large natural and undeveloped areas. The trail's proximity to New York City and the various ridges it traverses, including Forest Hill, Orange Mountain, and Second Watchung Mountain, offer many views of the skyline. The Lenape Trail forms a segment of the Liberty-Water Gap Trail and incorporates the West Essex Trail, the Lenape Trail's only rail-to-trail section. The Lenape Trail also connects with Morris County's Patriots Path trail system on its western terminus.
The Moggy Hollow Natural Area is a 14-acre (5.7 ha) nature preserve in Far Hills, Somerset County, New Jersey, United States. As the Wisconsin Glacier advanced, Glacial Lake Passaic formed eventually rising until it found an outlet at Moggy Hollow, draining to the Raritan River. It was designated a National Natural Landmark in January 1970.
Goffle Hill, also referred to as Goffle Mountain and historically known as Totoway Mountain and Wagaraw Mountain, is a range of the trap rock Watchung Mountains on the western edge of the Newark Basin in northern New Jersey. The hill straddles part of the border of Bergen County and Passaic County, underlying a mostly suburban setting. While hosting patches of woodlands, perched wetlands, and traprock glades, the hill is largely unprotected from development. Extensive quarrying for trap rock has obliterated large tracts of the hill in North Haledon, and Prospect Park. Conservation efforts seeking to preserve undeveloped land, such as the local Save the Woods initiative (2007–present), are ongoing.
The Lee Meadows Swamp is a swamp that originally covered 500-acre (2.0 km2) with low woodlands surrounding it. It is located in the southeastern section of Parsippany-Troy Hills Township and the western section of Hanover Township, in Morris County, New Jersey, United States. Due to the construction of office buildings and roads in the 1980s, the swamp has been reduced in size.
Lake Kankakee formed 14,000 years before present (YBP) in the valley of the Kankakee River. It developed from the outwash of the Michigan Lobe, Saginaw Lobe, and the Huron-Erie Lobe of the Wisconsin glaciation. These three ice sheets formed a basin across Northwestern Indiana. It was a time when the glaciers were receding, but had stopped for a thousand years in these locations. The lake drained about 13,000 YBP, until reaching the level of the Momence Ledge. The outcropping of limestone created an artificial base level, holding water throughout the upper basin, creating the Grand Kankakee Marsh.
Lake Circle was a glacial lake that formed during the late Pleistocene epoch along the Redwater River in eastern Montana. After the Laurentide Ice Sheet retreated, glacial ice melt accumulated in the basin surrounded by the ridges of the preglacial valley and the retreating glacier. Southwest of Nickwall are the remnants of a broad abandoned valley with long side slopes. The valley runs north from Redwater Creek to the Missouri River. The bottom is poorly drained and about 1 mile (1.6 km) in width. It lies 2,015 to 2,020 feet above the sea level and 40 to 50 feet above the Missouri River bottomland. The upland slopes are extensive, clear and flat. The valleys surrounding it are dissected with V-shaped coulees. The difference between the Redwater valley and those around it reflect stream erosion vs. lake sedimentation. The drift in the valleys, appears to be as left by the glacier in the previously created valleys. Using the dating of lake deposits near Great Falls, Montana, the Havre lobe of the Laurentide Ice Sheet dammed the ancestral Missouri River during the late Wisconsin Glacial Period.
