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Topic: Caledonian Orogeny

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Granville orogeny

Acadian orogeny

Antler orogeny

Caledonian Orogeny

Appalachian orogeny

Alleghenian orogeny

Cadomian Orogeny

Sevier orogeny

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	Caledonian Orogeny redefined, The Journal of the Geological Society - Find Articles
		The Caledonian Orogeny is here redefined to include all the Cambrian, Ordovician, Silurian and Devonian tectonic events associated with the development and closure of those parts of the Iapetus Ocean, which were situated between Laurentia (to the NW) and Baltica and Avalonia (to the SE and east).
		We suggest that the term `Caledonian Orogeny' be restricted in this geographic sense, but that (as in modern usage) it continues to encompass a series of tectonic, or orogenic, phases (related to arc-arc, arc-continent and continent-continent collisions as Iapetus was closing).
		The term 'Caledonian' is derived from the Latin word for Scotland and was commonly employed in British nineteenth century literature to refer to the Scottish Highlands.
	findarticles.com /p/articles/mi_qa3721/is_200011/ai_n8915797 (901 words)

	Caledonian Orogeny
		During the Lower Palaeozoic the continents of Baltica, Avalonia and Laurentia were separated by the Iapetus Ocean.
		The Caledonian Orogeny marks the closure of the Iapetus Ocean.
		The Caledonide mountain belt associated with this orogeny stretched from present day Scandinavia, across the British Isles, to the east coast of America.
	www.esc.cam.ac.uk /fieldtrip/arran/caledonian.htm (141 words)

	Orogeny Totally Explained
		Orogeny (Greek for "mountain generating") is the process of mountain building, and may be studied as a tectonic structural event, as a geographical event and a chronological event, in that orogenic events cause distinctive structural phenomena and related tectonic activity, affect certain regions of rocks and crust and happen within a time frame.
		Orogenic events occur solely as a result of the processes of plate tectonics; the problems which were investigated and resolved by the study of orogenesis contributed greatly to the theory of plate tectonics, coupled with study of flora and fauna, geography and mid ocean ridges in the 1950s and 1960s.
		It was, in the context of orogeny, contested hotly by proponents of vertical movements in the crust (similar to tephrotectonics), or convection within the asthenosphere or mantle (geology).
	orogeny.totallyexplained.com (1615 words)

	Caledonian orogeny - Wikipedia, the free encyclopedia
		The Caledonian orogeny is a mountain building event recorded in the mountains and hills of northern Scotland, Ireland, England, Wales, and west Norway.
		The Caledonian range already existed and was contiguous to the ancestor of the Appalachian Mountains of the eastern United States.
		At the end of the Silurian and in the subsequent Devonian, the rest of Avalonia collided, causing the Acadian Orogeny of North America, which raised the early Appalachian Mountains.
	en.wikipedia.org /wiki/Caledonian_mountains (347 words)

	Orogeny - Wikipedia, the free encyclopedia
		Orogeny (Greek for "mountain generating") is the process of mountain building, and may be studied as a tectonic structural event, as a geographical event and a chronological event, in that orogenic events cause distinctive structural phenomena and related tectonic activity, affect certain regions of rocks and crust and happen within a time frame.
		Orogenic events occur solely as a result of the processes of plate tectonics; the problems which were investigated and resolved by the study of orogenesis contributed greatly to the theory of plate tectonics, coupled with study of flora and fauna, geography and mid ocean ridges in the 1950s and 1960s.
		It was, in the context of orogeny, contested hotly by proponents of vertical movements in the crust (similar to tephrotectonics), or convection within the asthenosphere or mantle (geology).
	en.wikipedia.org /wiki/Orogeny (1442 words)

	The Acadian Orogeny
		Continued convergence in the southern Iapetus Sea initiated the Caledonian orogeny, the precursor to the Acadian orogeny.
		The Caledonian orogeny was caused by the collision between Baltica and Greenland, which was attached to Canada at the time.
		The Acadian orogeny and the Caledonian orogeny mark the assemblage of the super-continent Laurussia.
	bartik.brynmawr.edu /students/mlindhol/overview.html (322 words)

	GO 568 Northern Europe I
		This orogeny is parallel in timing and cause to the Acadian Orogeny of the northern Appalachians during the Devonian.
		This Precambrian gneiss was reworked during the Caledonian Orogeny (Devonian).
		Anorthosite is typical of the Grenvillian Orogeny (late Proterozoic), and this rock was reworked during the Caledonian Orogeny (Devonian).
	academic.emporia.edu /aberjame/struc_geo/euro_north/euro1.htm (978 words)

	[No title]
		Taconic Orogeny —In the Late Ordovician-Early Silurian, graywacke and interbedded volcanics indicate closure in the Taconic orogeny.
		Antler Orogeny - This began in the Devonian, with the subduction of oceanic lithosphere beneath the western margin of the craton, crushing sediment in the intervening basin.
		Caledonian Orogeny - This event is the culmination of the closure of the Iapetus Ocean.
	www.lee.edu /~cguldenzopf/Historical/Chapters/Historicalch20.doc (7300 words)

	Caledonian Granites
		The closure of Iapetus between 450 and 400 Myr, the climax of the Caledonian Orogeny, raised great mountains in Scotland and Ireland.
		The late Caledonian batholith is 80 km long, WNW-ESE trending axis lies astride and stitches the EW trending Skird Rocks Fault which is probably a westerly extension of the Southern Uplands Fault.
		The second phase at approximately 380 Ma was emplaced due to input of mantle material into the crust that caused remelting of the older material.
	epsc.wustl.edu /~rbuchwaldt/galway.html (485 words)

	Earth Science: Plate Tectonics Present to Cambrian
		Orogeny continues in the Mediterranean region and India nears its junction with southern Asia.
		The Atlantic lengthens and widens, the Sevier orogeny continues, and the Caribbean arc is formed.
		The western fringe of Pangaea was adjacent to a long subduction zone that formed the eastern margin of the Pacific "ring of fire".
	geowords.com /lostlinks/j01/1.htm (710 words)

	Geol Evol Virginia-Cross Section J
		s with the Taconic orogeny in the Mid-Atlantic, we are most aware of the Acadian from the sedimentary record, and the thick accumulation of clastic sediments that are spread throughout the western Valley and Ridge and eastern Allegheny plateau (province map).
		The Acadian orogeny is not as complex in its foreland basins and mountain structure as the Taconic (Stage H), but its rocks are more widely and obviously exposed, and we know a lot about the environments, and climate, and life of the time.
		ith the onset of the orogeny the foreland basin subsided rapidly.
	csmres.jmu.edu /geollab/vageol/vahist/J-MidlatD.html (2795 words)

	Geology Crieff Comrie Auchterarder Perthshire Scotland
		Both this and the Caledonian Orogeny can be seen in N America showing that Perthshire and N America were part of one continent in ancient times with a major ocean lying to what is now the south.
		By the end of the Caledonian Orogeny, what is now the Scottish Highlands had been thrown up into a massive mountain range; this was more like the present day Himalayas than the Scottish Highlands.
		While the folding and metamorphism of an Orogeny are manifestations of compression due to crustal plate collision, dyke swarms result when the crust is stretched.
	www.strathearn.com /ge/geology.htm (588 words)

	Middle Paleozoic Geology
		The presence of the Catskill sedimentary wedge indicates renewed uplift to the east (Acadian Orogeny).
		Deformation resulting from the Caledonian Orogeny is recognized today largely in Scotland and Norway where the suture zone is located.
		The Antler Orogeny was possibly caused by collision between western North America and volcanic arc to the west.
	www.uh.edu /~geos6g/1376/midpaleogeol12.html (1494 words)

	Freeman-Lynde GLY116 Paleozoic Tectonics Questions
		The Piedmont collided with Laurentia to cause the Taconic Orogeny.
		The clastic wedge associated with the Caledonian Orogeny is the _________________.
		The clastic wedge associated with the Devonian Acadian Orogeny of Laurentia is the ___________.
	www.arches.uga.edu /~rfreeman/Paleozoic_tectonics_questions.html (2727 words)

	Handprint : Geoevolution
		This process raised new mountain ranges in the Caledonian orogeny along the impact edges of the Siberian and North American continental blocks.
		The large Caledonian-Acadian orogeny resulted from the continued collision of the three continental blocks, but most of what is today central Europe and the United States were submerged under shallow coastal seas.
		The impact of Cimmeria with Laurasia formed the Cimmerian orogeny, including the ancestral Caucasus Mountains, and the impact of the Chinese and Tibetan blocks raised the ancestral Siberian and Chinese mountains.
	www.handprint.com /PS/GEO/geoevo.html (3279 words)

	Caledonian Structures of the Southern Uplands - GCR block
		Igneous rocks that formed as a result of the Caledonian Orogeny are encompassed by the CAL-IGN GCR Block
		There is at present no agreed definition of the term ‘Caledonian’, but is taken here to include all of the convergent tectonic and magmatic events arising from the closure of the ‘proto-Atlantic’ Iapetus Ocean in which many of the rocks of Late Proterozoic and early Palaeozoic age had been deposited.
		From studies of fauna, sedimentary history, igneous activity, structural and metamorphic evolution, and palaeomagnetism on its two sides, it is considered that deformation of sediments and volcanic rocks, resulting from the episodic closure of the Iapetus Ocean, took place through the early Palaeozoic to culminate in continental collision during the early Devonian.
	www.jncc.gov.uk /earthheritage/gcrdb/GCRblock.asp?block=14 (1271 words)

	Driva Kro og Steinsenter
		· In the Oppdal area, a sequence of Caledonian thrust nappes was metamorphosed, recumbently folded, and refolded during the Caledonian orogeny.
		The whole succession of rock units was metamorphosed and recumbently folded together in "Pennine" style during the Caledonian orogeny.
		The absence of acid intrusive rocks in the overlying metasedimentary cover suggests that the intrusive events were confined to the earlier Proterozoic, and that the foliations cut by the intrusions are relicts of Proterozoic structures.
	www.rise.no /engelsk/geology/tectonic.htm (3226 words)

	paleozoic earth glossary (Site not responding. Last check: )
		A Silurian-Devonian orogeny that occurred along the northwestern margin of Baltica resulting from the collision of Baltica with Laurentia.
		An orogeny that deformed the Ouachita mobile belt during the Pennsylvanian Period.
		The clastic wedge resulting from the erosion of highlands formed during the Taconic orogeny; deposited on the west side of the Taconic Highlands.
	www.epcc.edu /ftp/Homes/krimkus/paleozoicearthgloss.htm (621 words)

	Structure
		The Moine Thrust Zone represents the Caledonian Front, the zone between the deformed hinterland of the orogeny and the undeformed foreland.
		The thrust belt itself extends in outcrop from Eriboll on the northernmost coast of Scotland to Sleat on the Isle of Skye, a length of approximately 200 km.
		The Moines were however subsequently further deformed and metamorphosed during Caledonian activity, and the Moine Thrust Plane is recognised as part of the Caledonian Front.
	www.es.ucl.ac.uk /undergrad/fieldwork/image/assynt/assynt/struct.htm (849 words)

	chap 8
		Caledonian (on north west) E. Extensive sediment belts 1.
		Caledonian History (Caledonia = Scotland) A. Geographic extent: Scotland and northwestern Scandinavia B. Trans.-Atlantic continuation of Appalachian mountains C. Tectonic History: Wilson Cycle 1.
		Climax of orogeny: Late Silurian to Early Devonian a.
	www.umt.edu /geology/faculty/stanley/g106/g106_ch8.htm (1092 words)

	Chapter 9 (Site not responding. Last check: )
		Recall that the Taconic Orogeny (Middle Ordovician/Early Silurian) took place along a subduction zone in the Iapetus Ocean along which one or more island arcs were accreted onto the eastern margin of North America.
		The Caledonian Orogeny took place in the late Silurian and involved the collision of the eastern edge of Greenland in the north with what is now Scotland.
		This orogeny is thought to have resulted from the collision of the Klamath island arc with the western part of the craton.
	ccollege.hccs.cc.tx.us /instru/physci/geo/cate/historical/HistCh9.htm (1625 words)

	The Palaeozoic development
		Deformation decreases southwards, and the southern part of the fold belt is a thin-skinned fold and thrust zone that coincides with the region which was transitional between the platform and trough for much of the Cambrian.
		The Caledonian fold belts on both sides of the North Atlantic developed as a consequence of collision between the continents of Laurentia to the west and Baltica to the east following closure of the proto-Atlantic ocean (Iapetus).
		Following the Caledonian orogeny a period of extensional faulting led to the initiation of a Devonian sedimentary basin in central East Greenland.
	www.geus.dk /program-areas/raw-materials-greenl-map/greenland/gr-map/nh03_1s-dk.htm (703 words)

	Timeline 415 Million 71 Million
		The Caledonian mountains formed in the early half of this period.
		Known as the Caledonian orogeny, this climax was accompanied by the intrusion of granites and widespread alteration of the old geosynclinal sediments.
		A continuation of the Caledonian orogeny along the maritime coast of Canada is called the Acadian earth movement.
	timelines.ws /000415_71MIL.HTML (11224 words)

	Geology111-Lecture 28 (Site not responding. Last check: )
		Prior to the Caledonian, shallow water fossil species in Europe and North America were very different suggesting that they were separated by a wide ocean basin called the Iapetus Ocean.
		.....The Innuitian Orogeny occured in the Devonian and Mississipian and affected the Franklin Geosyncline in northern Canada.
		.....The Hercynian Orogeny occured in the Upper Carbonmifierous (the Pennsylvanian).
	www.geol.binghamton.edu /faculty/naslund/Geol.111.lect29c.html (481 words)

	Edinburgh Geological Society
		The final closure of the ocean led to the Caledonian Orogeny, and the formation of the Caledonian Mountains to the north.
		Due to the mountain building Caledonian Orogeny, the once-horizontal layers of sediment are now tilted vertically.
		The Caledonian Mountains were eroded heavily in the arid environment of the Lower Devonian, ultimately being worn down to level plains.
	www.edinburghgeolsoc.org /o_home.html (808 words)

	Scotland Geology
		The Caledonian Orogeny was a continental collision which closed the Iapetus Ocean, collided the rocks of England and Scotland, and fused the main jigsaw pieces of Scotland together.
		This fault plane separates the gneiss and sandstones of the west from metamorphic rocks, the Moine Schist, to the east.
		This activity was associated with the Caledonian Orogeny, and there were many volcanoes as well, as for example at Glencoe.
	www.visitscotland.com /aboutscotland/Geography/geology (1173 words)

	Discover Montenegro " Hidden Gem of the Mediterranean" Geography
		A segment of the Dinaric geosyncline which forms the terrain of Montenegro, is predominantly (on two thirds of the territory) built up of limestone and dolomite sediments (from Devonian; to the nowadays).
		Since the end of Devonian period (ending phase of Caledonian orogeny), it has been uplifted and lowered by numerous phases of Hercynian and Alpine orogeny.
		Due to epeirogenic and orogenic movements in different geological times, since the end of the Devonian period to the final uplifting of Dinaric geosyncline, when present territory of Montenegro (end of Middle Miocene) has been formed, some parts of the geosyncline bottom have been, more or less, uplifted and lowered.
	www.discover-montenegro.com /Geography.htm (1966 words)

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