1-20 OF 128 RESULTS FOR

Manitou Islands

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Image
Selected outcrop expression of the Manitou Islands outlier. (A) Two boulder-size syenite clasts (white dashed lines) with intervening sand matrix form basal breccia that overlies nonconformably (yellow line) crystalline basement, Great Manitou Island. Hammer for scale. (B) Photograph of polished slab of feldspathic arenite matrix of the basal boulder breccia showing dolomitized bivalve shells (arrows). Scale bar = 1 cm. (C) Outcrop of pebbly dolostone (Unit 2, Great Manitou Island). Knife for scale. (D) Limestone of Unit 4a (Great Manitou Island) exhibiting two styles of erosional surfaces in lime mudstone: a burrowed discoloured firmground (lower arrow), and erosional contact (upper arrow) with overlying skeletal wackestone. Scale bar = 1 cm. (E) Pebbly feldspathic arenite (Little Manitou Island; see Fig. 2C for location) with abundant fossilized whole body orthoconic nautiloids (arrow). Knife for scale. (F) Thinly interlaminated lime mudstone and dolomudstone forming the highest unit (Little Manitou Island). Length of measuring stick is 1.1 m. [Colour online.]
Published: 08 June 2020
Fig. 9. Selected outcrop expression of the Manitou Islands outlier. (A) Two boulder-size syenite clasts (white dashed lines) with intervening sand matrix form basal breccia that overlies nonconformably (yellow line) crystalline basement, Great Manitou Island. Hammer for scale. (B) Photograph
Book Chapter

Series: DNAG, Centennial Field Guides
Published: 01 January 1987
DOI: 10.1130/0-8137-5403-8.303
EISBN: 9780813754093
... and extends northward along theLake Michigan shoreline to Good Harbor Bay in Leelanau County (Fig.1). The national lakeshore also includes both North and South Manitou islands. Access to the national lakeshore by automobile is by Michigan 22. Access to the Manitou Islands is by private or charter boat...
Image
Stratigraphic attributes of the Great Manitou Island section. See Fig. 3 for additional explanation of symbols, lithology, and fossil types, and Tables 1 and 2 for facies details. Light grey bars indicate isotopic range of Sandbian marine calcite.
Published: 08 June 2020
Fig. 8. Stratigraphic attributes of the Great Manitou Island section. See Fig. 3 for additional explanation of symbols, lithology, and fossil types, and Tables 1 and 2 for facies details. Light grey bars indicate isotopic range of Sandbian marine calcite.
Journal Article
Published: 08 June 2020
Canadian Journal of Earth Sciences (2021) 58 (1): 1–20.
...Fig. 9. Selected outcrop expression of the Manitou Islands outlier. (A) Two boulder-size syenite clasts (white dashed lines) with intervening sand matrix form basal breccia that overlies nonconformably (yellow line) crystalline basement, Great Manitou Island. Hammer for scale. (B) Photograph...
FIGURES
First thumbnail for: Upper Ordovician (Sandbian–Katian) carbonate outli...
Second thumbnail for: Upper Ordovician (Sandbian–Katian) carbonate outli...
Third thumbnail for: Upper Ordovician (Sandbian–Katian) carbonate outli...
Image
Local Precambrian bedrock geology in the region of Upper Ordovician outliers in the northern Ottawa–Bonnechere graben. Maps drawn using Inkscape, modified from Baer et al. (1971) and Lumbers (1976). (A) Distribution of outliers: 1, Deux Rivières; 2, Brent Crater; 3, Cedar Lake; 4, Manitou Islands; 5, Owen Quarry. (B) Brent Crater (Loc. 2), with location of core #1-59 (Lozej and Beales 1975a), and the nearby Cedar Lake (Loc. 3) outlier. Brent Crater is capped by a mantle of Quaternary sediment and is host to two lakes: Gilmour (G) and Tecumseh (T). (C) The elliptical distribution of the Manitou Islands, with the principal outlier section on Great Manitou Island (Loc. 4), is shown relative to the interpreted underlying distribution of a Neoproterozoic syenite intrusive (Lumbers 1971). (D) Outcrop distribution at Owen Quarry (Loc. 5) among three fault blocks (5A–5C) adjacent to a fault escarpment of Precambrian gneiss.
Published: 08 June 2020
, Manitou Islands; 5, Owen Quarry. (B) Brent Crater (Loc. 2), with location of core #1-59 ( Lozej and Beales 1975 a ), and the nearby Cedar Lake (Loc. 3) outlier. Brent Crater is capped by a mantle of Quaternary sediment and is host to two lakes: Gilmour (G) and Tecumseh (T). (C) The elliptical
Image
Bedrock geology and other control data for the Keweenaw Peninsula (Upper Michigan, USA) and southeast end of the cross-section (bold red line). Geologic units (codes in Fig. 2) and Keweenaw fault system slightly modified from Cannon and Nicholson (2001). Black lines and dots within the Portage Lake Volcanics (Ypl) mark horizons and locations with layer-parallel slip (Hubbard, 1898); not all slipped horizons (see Fig. 2) are shown due to scale. Yellow dots along Keweenaw fault mark excavations across it (Irving and Chamberlin, 1885). Blue numbered lines and end dots are seismic refraction lines (Halls and West, 1971a) and sonobuoy locations with interpreted depths (red numbers) to base of Jacobsville Sandstone (Yj) in meters below lake level (183.5 m above mean sea level). Dashed black contours show Bouguer gravity in milligals (Klasner et al., 1979). Locations with letters: Q—Quincy Mine (Ypl); B—Bacon (1966) seismic reflection work; R—Rice Lake #1 drill hole (Yj); T—Traverse Island (Yj); H—Huron Islands (Wgr); L—Limestone Mountain (Pzu); M—Manitou Island (Yc). Portage Lake is south of location B; Lac La Belle and Bête Grise Bay are west and southeast, respectively, of the most easterly yellow dot.
Published: 25 May 2022
—Quincy Mine (Ypl); B—Bacon (1966) seismic reflection work; R—Rice Lake #1 drill hole (Yj); T—Traverse Island (Yj); H—Huron Islands (Wgr); L—Limestone Mountain (Pzu); M—Manitou Island (Yc). Portage Lake is south of location B; Lac La Belle and Bête Grise Bay are west and southeast, respectively
Image
Geological framework along the southern Canadian Shield. (A) Distribution of Ordovician outliers (1, Deux Rivières; 2, Brent Crater; 3, Cedar Lake; 4, Manitou Islands; 5, Owen Quarry) relative to the boundary limits (red dashed lines) of the Ottawa–Bonnechere (OBG) and Timiskaming (TG) grabens, and distribution of Precambrian bedrock (white) and Paleozoic sedimentary cover (grey) in south-central Canada and the adjacent United States. Lower Katian sections with ooids are denoted by red arrows (Oruche et al. 2019; this study). The interior limit of the Appalachian orogen (AO) and location of a topographic profile (X–X′) presented in Fig. 1B are indicated. The inset map shows distribution of regional sedimentary basins, regional arches (thin dashed lines), and axes of the OBG and TG. Basins: A, Appalachian Basin; HB, Hudson Bay Basin; M, Michigan Basin; MR, Moose River Basin; OE, Ottawa Embayment; uMV, upper Mississippi Valley. Map drawn in Inkscape and modified from Sanford (1993). (B) Topographic profile (X–X′ in Fig. 1A) across the OBG and TG axes was generated using Google Earth Pro and completed using Inkscape. Shown schematically are major high-angle faults, the alkaline intrusion beneath Loc. 4, and a structural platform underlying Loc. 5 adjacent to a regional fault escarpment. (C) Middle and Upper Ordovician formations and megasequence divisions underlying platform successions peripheral to the southern Canadian Shield. Based on Stott (1991), Ettensohn and Brett (2002), Armstrong and Carter (2010), and Oruche et al. (2018).
Published: 08 June 2020
Fig. 1. Geological framework along the southern Canadian Shield. (A) Distribution of Ordovician outliers (1, Deux Rivières; 2, Brent Crater; 3, Cedar Lake; 4, Manitou Islands; 5, Owen Quarry) relative to the boundary limits (red dashed lines) of the Ottawa–Bonnechere (OBG) and Timiskaming (TG
Journal Article
Published: 01 December 1987
Canadian Journal of Earth Sciences (1987) 24 (12): 2412–2421.
...Robert Marquis; Normand Goulet Abstract Stratigraphic and structural relationships show that the Trivio and Garden Island sedimentary groups could be lateral equivalents. The ubiquitous presence of shear zones between the sedimentary (Trivio and Garden Island) and volcanic (Kinojévis and Malartic...
Journal Article
Published: 01 July 2004
The Journal of Geology (2004) 112 (4): 435–454.
..., it contains minor intermediate to felsic components that have calc-alkaline characteristics. The Wapageisi Group is similar to a back-arc sequence, whereas Boyer Lake Group is typical of an oceanic island arc setting. The Stormy basin displays bimodal volcanism with calc-alkaline porphyry stocks and felsic...
FIGURES
First thumbnail for: Archean Molasse Basin Evolution and Magmatism, Wab...
Second thumbnail for: Archean Molasse Basin Evolution and Magmatism, Wab...
Third thumbnail for: Archean Molasse Basin Evolution and Magmatism, Wab...
Journal Article
Published: 01 April 1989
Earth Sciences History (1989) 8 (1): 36–42.
..., Islands of the Twelve Apostles (Apostle Islands), Manitou Island, and the Slate Islands. Bayfield also was the first to examine the shorelines around all of the Keweenaw Peninsula. Bayfield’s observations regarding Isle Royale, the Keweenaw Peninsula, and Michipicoten Island are particularly...
FIGURES
First thumbnail for: EARLY GEOLOGIC STUDIES IN THE LAKE SUPERIOR REGION...
Second thumbnail for: EARLY GEOLOGIC STUDIES IN THE LAKE SUPERIOR REGION...
Journal Article
Journal: PALAIOS
Published: 01 December 2005
PALAIOS (2005) 20 (6): 518–533.
.... 1952 . Cephalopods from the Harding and Manitou formations of Colorado : Journal of Paleontology , v. 26 , p. 505 – 518 . Frey , R.W. , and Howard , J.D. , 1988 . Beaches and beach-related facies, Holocene barrier islands of Georgia : Geological Magazine , v. 125 , p. 621 – 640...
FIGURES
First thumbnail for: The Sequence Stratigraphic and Environmental Conte...
Second thumbnail for: The Sequence Stratigraphic and Environmental Conte...
Third thumbnail for: The Sequence Stratigraphic and Environmental Conte...
Journal Article
Published: 01 March 2006
Journal of Paleontology (2006) 80 (2): 386–391.
...) and provided a preliminary faunal list. According to Ethington, the fauna from 42.0 m above the base of the Manitou Formation is dominated by Scolopodus floweri Repetski, 1982 . There is also the zonal index, Macerodus dianae Fahraeus and Nowlan, 1978 , present along with Drepanodus arcuatus Pander, 1856...
FIGURES
First thumbnail for: MANITOUSCOLEX , A NEW PALAEOSCOLECIDAN GENUS FROM ...
Second thumbnail for: MANITOUSCOLEX , A NEW PALAEOSCOLECIDAN GENUS FROM ...
Third thumbnail for: MANITOUSCOLEX , A NEW PALAEOSCOLECIDAN GENUS FROM ...
Journal Article
Journal: AAPG Bulletin
Published: 01 November 1967
AAPG Bulletin (1967) 51 (11): 2260–2280.
... and typically is deeply weathered with a regolithic Precambrian-Manitou interface. A gradual onlap with numerous coastal embayments and islands is envisioned, similar to modern submergent coastlines. Southward thinning of the Manitou apparently was accomplished both by pre-Harding erosion, which in places...
FIGURES
First thumbnail for: Paleozoic Geologic Development of Canon City Embay...
Second thumbnail for: Paleozoic Geologic Development of Canon City Embay...
Third thumbnail for: Paleozoic Geologic Development of Canon City Embay...
Journal Article
Published: 01 December 2005
Canadian Journal of Earth Sciences (2005) 42 (10): 1829–1847.
...T. Clark; A. Gobeil; J. David Abstract The Manitou Lake area (Kwyjibo and Lac Marmont sectors), located in Quebec’s eastern Grenville Province, contains magnetite-rich deposits with variable morphological, mineralogical, and chemical characteristics. Most Kwyjibo sector deposits are rich in Cu...
FIGURES
First thumbnail for: Iron oxide—copper—gold-type and related deposits i...
Second thumbnail for: Iron oxide—copper—gold-type and related deposits i...
Third thumbnail for: Iron oxide—copper—gold-type and related deposits i...
Journal Article
Journal: AAPG Bulletin
Published: 01 February 1954
AAPG Bulletin (1954) 38 (2): 284–305.
... the Harding and the underlying Manitou, and between the Harding and the Fremont. The known invertebrate fauna of the Harding is dominantly molluscan and indicates a Black River age for the formation; the large conodont fauna further suggests a correlation with the Glenwood beds of Minnesota, the Icebox shale...
FIGURES
First thumbnail for: Harding and Fremont Formations, Colorado
Second thumbnail for: Harding and Fremont Formations, Colorado
Third thumbnail for: Harding and Fremont Formations, Colorado
Journal Article
Published: 22 November 2019
Geochemistry: Exploration, Environment, Analysis (2020) 20 (2): 233–256.
... samples from South Kawishiwi intrusion drill core. Olivine sorting alone cannot explain the compositional variations in these rocks. Fig. 34. GER diagram plotting (Na + K)/Al against Na/Al for 4604 Read and Manitou Falls Formation samples from above the Phoenix unconformity U deposit...
FIGURES
First thumbnail for: Molar element ratio analysis of lithogeochemical d...
Second thumbnail for: Molar element ratio analysis of lithogeochemical d...
Third thumbnail for: Molar element ratio analysis of lithogeochemical d...
Journal Article
Published: 01 November 2007
The Journal of Geology (2007) 115 (6): 655–674.
... , Medium-scale map illustrating the geology surrounding typical molasse basins (Stormy and Manitou lakes examples) in the Wabigoon Subprovince. Modified from Blackburn et al. ( 1991 ). Table 1. Examples of Molasse Basins in the Superior Province, Canada Molasse basin Age Characteristics...
FIGURES
First thumbnail for: Time-Transgressive Archean Unconformities Underlyi...
Second thumbnail for: Time-Transgressive Archean Unconformities Underlyi...
Third thumbnail for: Time-Transgressive Archean Unconformities Underlyi...
Journal Article
Journal: AAPG Bulletin
Published: 01 January 1963
AAPG Bulletin (1963) 47 (1): 129–149.
..., for distinctive faunal and lithologic zones can be traced from Manitoulin Island, Ontario, through the northern peninsula of Michigan and southward into eastern Wisconsin. This has led to the generally accepted stratigraphic interpretation of a succession of Niagaran seas, each with a distinctive environment...
FIGURES
First thumbnail for: Transgressive Marginal Lithotopes in Niagaran (Sil...
Second thumbnail for: Transgressive Marginal Lithotopes in Niagaran (Sil...
Third thumbnail for: Transgressive Marginal Lithotopes in Niagaran (Sil...
Journal Article
Journal: AAPG Bulletin
Published: 01 June 1967
AAPG Bulletin (1967) 51 (6): 883–917.
... Cambrian shows the region as a wide, shallowly inundated coastal shelf with a west-northwesterly slope. A positive transcontinental arch between Laurentia and Siouxia forms a low sandy eastern shore or a maze of islands and shallow straits connecting with the upper Mississippi Valley region. The recurring...
FIGURES
First thumbnail for: Stratigraphy of Upper Cambrian-Lower Ordovician Su...
Second thumbnail for: Stratigraphy of Upper Cambrian-Lower Ordovician Su...
Third thumbnail for: Stratigraphy of Upper Cambrian-Lower Ordovician Su...
Journal Article
Published: 01 June 1928
Bulletin of the Seismological Society of America (1928) 18 (2): 104–109.
... volleys or claps of thunder mingled with the crashing together of the shaken and fallen trees, which frightened the entire populace beyond measure. The greatest terror had absolute command over the Indians and French. The Indians discharged their firearms in order to drive away the 'manitou.' During...