Where are the coniferous trees of northwestern pennsylvania located, and what are they?
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The coniferous trees in NW PA are located in NW PA.  They would include Eastern Hemlock, Balsam as well as several other firs.  Also green and blue spruce.  White pine may also be common.
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Most of the conifers have a huge number of leaves. The leaves are small and needle shaped or scale like so a large number can be packed by nature in a small space.Example are \nPines,Cedars,Junipers and Xmas tree.
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It looks to be PA. See the link below, and look under category 212 (mining excluding oil & gas). Further on in the same table, the data is broken out into more detail.\n\nSomething like the USGS probabaly has info on mineral deposits.
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Find;http://www.worldwildlife.org/wildworld/profiles/terrestrial/aa/aa0105_full.html\n\nlow elevation: bigcone spruce, canyon oak \nmiddle elevation: Jeffrey pine, Coulter pine, canyon oak, incense cedar; understory of grasses \nmiddle elevation and high country dry form: Jeffrey pine \nhigh country: Jeffrey pine, sugar pine, white fir, incense cedar, canyon oak, lodgepole pine (~8,000'+), limber pine (~9,000'+) \nfrom Lightning Ridge east or Sawmill Mountain west, add black oak \nhttp://tchester.org/sgm/plants/communities/montane-forest.html\n\nhttp://en.wikipedia.org/wiki/Montane_grasslands_and_shrublands
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check this site out ... go to the bottom and chk the other places heading ... this is what is given\n\nThe Big Thicket National Preserve is a dense forest with a wide variety of plant and animal life. The Alabama-Coushata Indian reservation is nearby.
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on a tree...have a look if there are some silver white or green patches (not moss) and scrape some off....there are lots of lichens about if you know where to look
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taiga is the northern forests, tundra is the permafrost zone in the north
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http://en.wikipedia.org/wiki/Pennsylvania
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This site is specific to PA.\nhttp://www.pameganslaw.state.pa.us/\nHappy hunting
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Mount Washington, the highest peak in the Northwestern U.S. is located in New Hampshire.  \n\nMount Washington, the highest peak in the northeastern U.S., attains an elevation of 6,288 feet above mean sea level, and is located at latitude 44° 16' N, longitude 71° 18' W.  It is in Sargents Purchase in Coös County, New Hampshire, at the heart of the White Mountain National Forest.  Originally called Agiocochook by native Americans, the mountain boasts some of the planet's most severe weather, and retains the world record for wind speed, 231 MPH.  The 52-acre Mount Washington State Park surrounds the summit, where visitors will find a multitude of old and modern buildings, once known as the 'City Among the Clouds'.
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The Cypress has leaves and a Juniper has needles - more info on both below\n\nThe bald cypress is found in marshy areas in the United States. The Cache Wetlands is an example in Southern Illinois where to find this imposing tree.\n\nThe bald cypress knees can be seen sticking out of the water like stumps. The leaves on a cypress tree are light green in spring and are dark brown in the summer time. The bark on the bald cypress is light gray to cinnamon red.\n\nThe bald cypress is so durable even the Indians used the tree. Sometimes the Indians would use the bald cypress for dugout canoes. \n\nJuniper One of the characteristic heathland shrubs of the chalk and limestone country is the Juniper - Juniperus communis. The shrub typically grows from 4 - 6 feet high with the trunk or stem often being contorted and twisted. The leaves take the form of needles of a deep green colour sometimes with a bluish-tinge, on account of which it is often known in folk tradition as the needle yew. The berries usually take two to three years to fully ripen, hence it is common to see both the bluish-black ripe berries alongside very green and under-ripe ones on the same bush. When fully ripe, the berries are about the size of a pea and have an aromatic resiny scent.
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The trees of Huangshan, China are famous for their beauty. You'll notice that many of the trees growing naturally on the mountainsides look like bonsai -- perhaps they were the original inspiration for bonsai styling.
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Boston Mills / Brandywine\nAlpine Valley\nSeven Springs (Pittsburgh, PA)
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The blue ridge mountains gets their name from the blue halo around the mountains ... particularly in the morning or evening from a distance.  The blue color comes from terpenoids.  Terpenoids are tiny tiny tiny airborne chemical released from coniferous trees.
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Have you seen this site:\n\nhttp://www.palaeos.com/Paleozoic/Carboniferous/Pennsylvanian.htm
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Northern:  Balsam, Frederick, Albany\nCentral:  DuPont, Tyler, Orange, Rutgers, Bond\nSouthern: Ocean, Delaware, Francis, Oakland
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Valley Forge, Pennsylvania\n\nFor more Information on the winter at valley forge go here:\n\nhttp://www.ushistory.org/valleyforge/history/vstory.html