The Twin Lakes are a pair of lakes connected by a
channel
Channel, channels, channeling, etc., may refer to:
Geography
* Channel (geography), in physical geography, a landform consisting of the outline (banks) of the path of a narrow body of water.
Australia
* Channel Country, region of outback Austral ...
in
Nipissing District,
Ontario
Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Ca ...
, Canada, about southeast of the village of
Temagami. They are individually named Upper Twin Lake and Lower Twin Lake.
Hydrology
Upper Twin Lake is about long and wide, and Lower Twin Lake is about long and wide; both lie at an elevation of . Monshan Island in Lower Twin Lake is the only named island of the Twin Lakes.
The primary outflow is an unnamed creek in the southwestern corner of Lower Twin Lake, which eventually flows via
Rabbit Creek,
Rabbit Lake, the
Matabitchuan River
The Matabitchuan River is a river in Nipissing and Timiskaming Districts, Ontario, Canada.
Hydrology
The river begins at Rabbit Lake in Nipissing District at an elevation of . It flows northeast over Rabbit Lake Dam and through Rabbit Chute to ...
,
Lake Timiskaming
Lake Timiskaming or Lake Temiskaming (french: Lac Témiscamingue) is a large freshwater lake on the provincial boundary between Ontario and Quebec, Canada. The lake, which forms part of the Ottawa River, is in length and covers an area of a ...
and the
Ottawa River
The Ottawa River (french: Rivière des Outaouais, Algonquin: ''Kichi-Sìbì/Kitchissippi'') is a river in the Canadian provinces of Ontario and Quebec. It is named after the Algonquin word 'to trade', as it was the major trade route of Eastern ...
into the
Saint Lawrence River
The St. Lawrence River (french: Fleuve Saint-Laurent, ) is a large river in the middle latitudes of North America. Its headwaters begin flowing from Lake Ontario in a (roughly) northeasterly direction, into the Gulf of St. Lawrence, connectin ...
.
Transportation
The
Ontario Northland Railway
The Ontario Northland Railway is a Canadian railway operated by the Ontario Northland Transportation Commission, a provincial Crown agency of the government of Ontario.
Originally built to develop the Lake Timiskaming and Lake Nipissing area ...
mainline runs along the entire western side of Lower Twin Lake and along the southeastern side of Upper Twin Lake; it crosses the narrows of the lakes on a bridge. A
railway point
A railroad switch (), turnout, or ''set ofpoints () is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off.
The most common ty ...
named
Doherty lies at the southwestern corner of Lower Twin Lake.
Geology
Situated on an abandoned railway siding near Upper Twin Lake is a wide
calcite
Calcite is a Carbonate minerals, carbonate mineral and the most stable Polymorphism (materials science), polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on ...
-
quartz
Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical form ...
vein
Veins are blood vessels in humans and most other animals that carry blood towards the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated b ...
mineralized with minor
pyrite
The mineral pyrite (), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Iron, FeSulfur, S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral.
Pyrite's metallic Luster (mineralogy), lust ...
,
arsenopyrite
Arsenopyrite ( IMA symbol: Apy) is an iron arsenic sulfide (FeAsS). It is a hard ( Mohs 5.5-6) metallic, opaque, steel grey to silver white mineral with a relatively high specific gravity of 6.1. When dissolved in nitric acid, it releases eleme ...
and
smaltite
Smaltite is a variety of the mineral skutterudite consisting of cobalt, iron, nickel, and arsenide. It has the chemical formula .
Smaltite crystallizes in the cubic system with the same hemihedral symmetry as pyrite; crystals have usually the ...
. This mineral showing, known as the Upper Twin Lake Occurrence, is hosted in
diabase
Diabase (), also called dolerite () or microgabbro,
is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-graine ...
of a
Nipissing sill just north of a
contact
Contact may refer to:
Interaction Physical interaction
* Contact (geology), a common geological feature
* Contact lens or contact, a lens placed on the eye
* Contact sport, a sport in which players make contact with other players or objects
* ...
with pebbly
greywackes and
conglomerate
Conglomerate or conglomeration may refer to:
* Conglomerate (company)
* Conglomerate (geology)
* Conglomerate (mathematics)
In popular culture:
* The Conglomerate (American group), a production crew and musical group founded by Busta Rhymes
** Co ...
s of the Coleman Member of the Gowganda Formation. The vein strikes in a southeast direction and is traceable for a distance of . Sampling has indicated low
silver
Silver is a chemical element with the Symbol (chemistry), symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, whi ...
and
copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkis ...
values with 50 parts per billion
platinum
Platinum is a chemical element with the symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish , a diminutive of "silver".
Platinu ...
and 30 parts per billion
palladium
Palladium is a chemical element with the symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by the English chemist William Hyde Wollaston. He named it after the asteroid Pallas, which was itself na ...
.
See also
*
Lakes of Temagami
References
External links
*
*{{cite cgndb, id=FCZHC, title=Upper Twin Lake, accessdate=2019-08-28
Lakes of Temagami
Strathcona Township