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Topic: Varve


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In the News (Mon 24 Jun 19)

  
  YourArt.com >> Encyclopedia >> Varve   (Site not responding. Last check: 2007-11-02)
Initially, varve was used to describe the separate components of annual layers in glacial lake sediments, but at the 1910 Geological Congress, the Swedish geologist Gerard De Geer (1858-1943) proposed a new formal definition where varve described the whole of any annual sedimentary layer.
Varves are amongst the smallest-scale events recognised in stratigraphy.
Although the term varve was not introduced until the late nineteenth century, the concept of an annual rhythm of deposition is at least two centuries old.
www.yourart.com /research/encyclopedia.cgi?subject=/Varve   (626 words)

  
 Varve - Search Results - MSN Encarta
Varve, yearly deposit of sediment forming distinctive layers.
Varve is most frequently used to refer to deposits formed in lakes on the margins of...
One of the oldest methods employed for absolute age determination, varve analysis, was developed by Swedish scientists in the early 20th century.
ca.encarta.msn.com /Varve.html   (121 words)

  
 [No title]   (Site not responding. Last check: 2007-11-02)
varve is a pair of thin layers of sediment.
Typically, one band of the varve is light and composed of sand, pollen, and spores, while the second layer is dark and composed of very fine clay particles.
In light of the positive evidence for the great age of these varves, combined with totally unacceptable explanations for their formation by Noah's Flood, it is clear that they are much older than the 10-20,000 years claimed by Young Earth Creationists as the age of the earth.
www.ibri.org /Tracts/varvetct.htm   (668 words)

  
 Varve Analysis   (Site not responding. Last check: 2007-11-02)
Varve analysis is the process of counting varves or annually laminated sediments to determine the rates of change in climate and various ecosystems.
A varve consists of two layers; a thick light colored layer of silt and fine sand which forms in the spring and summer and a thin dark colored layer of clay forming in the fall and winter.
Traditionally, when one "counted" varves, it proved to be a fairly monotonous and tiresome task resulting in much time lost and much subjectivity due to determining layers.
www.mnsu.edu /emuseum/archaeology/dating/dat_varve.html   (347 words)

  
 Glacial Lake Varves - Maine Geological Survey
Exposures of glacial lake sediments known as varves were found along Sandy Stream on the border between Dennistown Plantation and Moose River, northern Somerset County, approximately 3 miles north of the village of Jackman (Figure 1).
Varves are rhythmic couplets of coarse-grained and fine-grained sediments.
He developed a relative chronology of the deglaciation of New England, based primarily on varve deposits in the Connecticut River valley from an ancient lake known as Glacial Lake Hitchcock, as well as from other ancient glacial lakes elswhere in the northeast.
www.maine.gov /doc/nrimc/mgs/explore/surficial/sites/oct02.htm   (1167 words)

  
 AW2004 Abstract: Tomkins
Through image and microscopic analysis of thin sections, a varve chronology was developed and the resulting varve thickness record was compared to local meteorological data (Tungsten, 7 km from site) to determine hydrometeorological influences on varve formation during the past 35 years.
July temperature was the most influential climatic control over varve formation throughout the sedimentary record, although precipitation also played a role through the negative effect of thick snowpacks on glacier ablation during certain periods of the record.
Therefore, varve structure in the Mirror Lake record reflected the dominant hydroclimatic processes operating to transport sediment to the lake to form varves, in addition to demonstrating an annual record of climatic variability.
www.colorado.edu /INSTAAR/AW2004/get_abstr.html?id=60   (337 words)

  
 Varves - CreationWiki   (Site not responding. Last check: 2007-11-02)
A varve is a layer or series of layers of sediment deposited in a body of still water in one year.
Varve deposits from the lake were calibrated using Carbon-14 dating.
The standard model for varves has the light colored heavy material settle out in the spring and summer while the finer dark material stays in suspension until autumn and winter.
creationwiki.org /index.php?title=Varves   (316 words)

  
 AllRefer.com - varve (Geology And Oceanography) - Encyclopedia
varve, in geology, pair of thin sedimentary layers formed annually by seasonal climatic changes.
Usually found in glacial lake deposits, varves consist of a coarse-grained, light-colored summer deposit and a finer-grained, dark-colored winter deposit formed when fine sediment settles out from the water under the ice cover.
Varves, and the pollen they contain, are useful for interpreting recent climatic history.
reference.allrefer.com /encyclopedia/V/varve.html   (163 words)

  
 [No title]
The last 1550 years of the varved record was sampled at contiguous 1-cm intervals, with an average temporal resolution of 5 years.
Varve thickness data for Elk Lake are compiled in Allen, B. and Anderson, R. Y., 1990, Varve Thickness Time-Series, Elk Lake, Minnesota: Data submitted to NGDC.
Varve Thickness and Gray Scale Data File File Name: ofr1varv.wk1 File Size: Sampling Method: Varve thickness (in mm) and gray-scale density ranging from 0 (white) to 255 (fl) were measured on scanned images of the cores.
www1.ncdc.noaa.gov /pub/data/paleo/elklake/anderson-dean/elkinfo.txt   (1570 words)

  
 CH210: Age of the Earth
Varves are annual sediment layers that occur in large lakes.
One varve formation, covering 45,000 years, was used to calibrate carbon-14 dating using terrestrially produced leaves, twigs, and insect parts that also appeared in the sediments.
The varves were easy to count because they included an annual diatom bloom (Kitagawa and van der Plicht 1998).
www.talkorigins.org /indexcc/CH/CH210.html   (643 words)

  
 [No title]
General varve cessation is associated with the circumvention of Lake Agassiz and glacial meltwater into Lake Ojibway at 9,040 cal ybp [~8.1 14C ka], although adjacent to the Lake Nipigon inlets, rhythmic sedimentation persisted for 200 years.
Group I varves have winter layers that are thicker than summer layers, group II varves have layers of approximately similar thickness, and group III varves have summer layers that are thicker than winter layers.
She proposed that the rhythmites were “calcite solution” varves, whereby fast summer sedimentation rates prevented the dissolution of calcite in a lake that must have been undersaturated with respect to calcite.
www.d.umn.edu /~brec0027/Breckenridge_2005_canqua.doc   (4367 words)

  
 New Page 1   (Site not responding. Last check: 2007-11-02)
Varve analysis is the process counting annual layers or "laminations", to determine the rates of change in climate and various ecosystems.
Varves form when glacial advances come in contact with bodies of water such as lakes.
The picture above is showing a typical varve taken from Lake Balderggersee, which is located in the Alpine forest land.
users.aber.ac.uk /jib4/varves.htm   (120 words)

  
 Creation Science, Geology, Truth
In a varve, there are alternating layers, with a thicker, coarser layer, followed by a thinner, organic rich layer.
This would give support to the fact that varve layers could be from individual storm events, thus if you had an area that had 40 storms in a year, you could have 40 layers.
Please note that the number of varves increased as you went from the center of the basin to the outside edges.
www.answersincreation.org /varves.htm   (1839 words)

  
 Colorado New Wave/Punk Rock
The Varve sound was danceable and compelling, dense, chaotic, fragile and highly orchestrated, primal wardance, jazz-influenced rhythms, and rockabilly style vocals with Madness/Contortions styled sax.
The Varve rehearsed in a room underneath the bleachers of University of Colorado (Sue and Carolyn were both students) football stadium to hone their sound.
The Varve became well respected and a constant force to be reckoned with on the San Francisco scene.
newwave.50megs.com /varve.html   (1023 words)

  
 Varve Noise | Varve Music | Denver Boulder San Francisco
Varve was the name of a band of five inventive women who came together in the spring of 1980 in Boulder, Colorado, and blew apart in the fall of 1983 in San Francisco.
Their early gigs in odd Denver clubs were crude, exciting, and filled with an abundance of energy -- enough energy (and daring for such a young band) to send them hurtling towards San Francisco in the fall of 1980.
The Varve were set apart from traditional "pop" groups by their mosaic-like mixture of seemingly haphazard elements arranged to form a cohesive noise.
paperangels.home.att.net /varve   (423 words)

  
 DEGEER HTML   (Site not responding. Last check: 2007-11-02)
Gerard De Geer pioneered the study of glacial varves, and coined the term "geochronology." He was the professor of Ernst V. Antevs and several other prominent early twentieth-century geomorphologists.
The first varve series to be developed were of late glacial age.
Eventually, a system was developed in which the late-glacial varves were given negative numbers and postglacial varves positive ones, with the "Zero Varve" the boundary between late-glacial and postglacial time.
www.geo.arizona.edu /Antevs/degeer.html   (271 words)

  
 Central Watershed - Varves
Varves are found in the river and act as the lake records.
One summer/winter layer is an individual varve and represents a year in the life of the lake.
In 1922 Ernst Antevs, a Swedish geologist, traveled to New England to count, measure and correlate varves from Glacial Lake Hitchcock and the surrounding glacial lakes in the Ashuelot, Merrimack and Hudson River valleys.
www.wgby.org /edu/source/central/varve.html   (221 words)

  
 article20.htm   (Site not responding. Last check: 2007-11-02)
The varves are alternating dark and light grey bands of sub-millimeter scale separated by limonitic (pale yellow) bands and ice rafted dropstone debris.
These varves are in turn overlain by a 8 to 10 m thick fluvial gravel that constitutes the topmost lithofacies in the basin.
The varves are capped by the gravels indicating a major shift in the climate representing a very high energy fluvial regime comparable with interglacial conditions.
www.ias.ac.in /currsci/oct/articles19.htm   (3477 words)

  
 Lake Hitchcock
Often the sandy/silty layer of a varve couplet is eroded and undercuts the clay layer.
Each varve couplet marks a year; a continuous series of varves is the geological equivalent to the annual growth rings of a very old tree.
The varve couplets beneath the Connecticut River have never been studied and thus may offer new information concerning the rate of ice retreat and climate changes as we exited the last ice age.
www.bio.umass.edu /biology/conn.river/varvepub.html   (786 words)

  
 Varve Noise | Varve Music | Denver Boulder San Francisco
After they left I scribbled down some notes about their stay, their music and the five individuals that comprise the Varve, all of whom are friends of mine (although I really don't know drummer Kat, who joined after the rest of them moved to San Francisco a little over two years ago).
According to Sue in order quit the Varve a band member must go through a ridiculously complicated procedure involving a two year written notice, notarized in the city where the band was formed.
If Varve motion is driven by Kat, turned upside down by Carolyn and anchored deftly by Sue, then Jo Ann punches it in the face.
paperangels.home.att.net /varve/wanda.html   (2407 words)

  
 Lesson: Varves
Students count the number of varves (annual layers of sediment) in shale billets, taken from the Green River Formation in Wyoming.
Varve counts in natural samples will vary in a predictable way, fitting a normal curve.
Varve counting is one of many methods of geological dating.
www.indiana.edu /~ensiweb/lessons/varves.html   (1470 words)

  
 Lake Varves
The sedimentation or annual varve thickness is relatively uniform, typically 1.2 mm per yr for present conditions in Lake Suigetsu which is located near the coast of the Sea of Japan.
In order to reconstruct a more precise and longer varve chronology for the laminated sediments from Lake Suigetsu, we have reassessed the varve chronology in the whole section during the deglaciation as well as the Glacial up to a depth of 30.45 m.
The sedimentation or annual varve thickness is relatively uniform (typically 1.2 mm yr-1 during the Holocene and 0.62 mm yr-1 during the Glacial).
www.accuracyingenesis.com /varves.html   (2587 words)

  
 USGS Fact Sheet FS-059-99
One example of a lake with varved sediment is Elk Lake in the Mississippi headwaters region, Itasca Park, in northwestern Minnesota (fig.
Increased wind-borne dust is indicated by the thicker varves and marked increase in quartz.
Several Proxy indicators in the varved sediments of Elk Lake show that 8,000 to 4,000 years ago, dry, warm, windy, dusty prairie conditions with sagebrush vegetation occupied this region of Minnesota that is now forested.
pubs.usgs.gov /fs/fs-0059-99   (1020 words)

  
 Hughen et al.   (Site not responding. Last check: 2007-11-02)
The floating varve chronology was anchored to absolute calendar age by 'wiggle-matching' radiocarbon versus calendar age variations to those measured in the German pine dendrochronology.
Cumulative errors in varve counting were constrained to accrue only within the 3000 years older than tree rings and provide an additional 1-2% uncertainty during that period.
The pattern of increasing disagreement with age may reflect errors in either chronology compounding downcore, the direction in which the varves and annual ice layers were counted.
wdc.tropmet.res.in /paleo/pubs/hughen1998/cariaco.html   (950 words)

  
 Gerard De Geer - Wikipedia, the free encyclopedia
De Geer called these annual sedimentary layers varves and throughout the 1880's further developed his theory, publishing a brief outline of his discovery in 1882, which he followed with a presentation to the Swedish Geological Society in 1884.
His insistence that varves represented quantifiable proxies for past climate has since been borne out to a degree, but the relationship between varve thickness and hydrometeorological conditions is not as simple as he presumed.
Varves have recently experienced a renaissance as methods and techniques of study have improved, and varves are now regularly used to calibrate radiocarbon timescales.
en.wikipedia.org /wiki/Gerard_De_Geer   (1414 words)

  
 [No title]
However, the quantification/estimation of distributed components and the quantification of their portion on the total of a seasonal layer or varve are much more complicated and partly not.
This technique requires rather uniform varve types where brightness variation of the sediment is strictly seasonal and related to distinct sediment components.
More sophisticated varve types, with several seasonal layers and different dark and bright components (diatoms, fine-grained lithics, coarse-grained lithics, carbonates, plant rests and organic matter, pyrite) that may contribute to the signal in different seasonal layers cannot be studied by grey-value profiling.
www.uni-mainz.de /FB/Geo/Geologie/sedi/Peru/Quelldateien/digitalimageanalysis.doc   (336 words)

  
 SPECULATION ON GLACIAL VARVE DEPOSITION IN THE NORTHEASTERN US   (Site not responding. Last check: 2007-11-02)
Thick (10 to >100 cm) ice-proximal varves have massive silt/sand units suggesting rapid settling from meltwater plumes, and rippled and cyclically laminated silt/sand units.
Ice-distal varves (0.5-3 cm) have laminated silty summer beds thinner than winter clays due to starvation of sand/silt away from the glacier.
Pervasive ice-rafted debris (stones and pellets) in NY varves have not been found in New England, perhaps due to a combination of cleaner glacial ice and lower calving rates in a shallower lake.
gsa.confex.com /gsa/2001NE/finalprogram/abstract_2441.htm   (468 words)

  
 Atheism, Evolutionism, and Green River "Varves"
The "varve" model is not adequate to explain these differences because it would predict the same number of laminae lake‑wide as well as consistent unit thicknesses and kerogen content.
Second, the impression I have from the reading is that the laminae of the GRF are not classical varves; the dual aspect is not as clearly defined, etc..
This is not meant to be a definitive explanation of the Green River "varves;" rather, it is an attempt to show that Christians do not have to be afraid of interpretations that supposedly disprove the Bible.
www.rae.org /Varves2.htm   (3444 words)

  
 Varve - Risultati della ricerca - MSN Encarta
Varve Depositi annuali di sedimento, caratterizzati da una particolare successione di strati sottili; il termine è usato soprattutto per indicare i...
Metodi di datazione : Metodi di datazione assoluta : Analisi delle varve
Uno dei primi metodi di datazione assoluta, l’analisi delle varve, fu sviluppato in Svezia agli inizi del XX secolo.
it.encarta.msn.com /Varve.html   (79 words)

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