tag:blogger.com,1999:blog-4953008377950396317.post8691919178029200085..comments2024-03-28T09:42:06.214-07:00Comments on SearchReSearch: Wednesday search challenge (9/26/12): Why are the coasts SO different?Dan Russellhttp://www.blogger.com/profile/13603209997260423532noreply@blogger.comBlogger37125tag:blogger.com,1999:blog-4953008377950396317.post-27421641920271011442016-11-20T11:12:06.246-08:002016-11-20T11:12:06.246-08:00After publishing my previous post I wasn't abl...After publishing my previous post I wasn't able to find it for editing. My previous post attempted to generally address human condition including plant and animals. As for historical geological perspectives and differences between the West and East Coast, my knowledge is limited. I haven't yet studied geolocic differences which would take from several weeks to months to accomplish. There is much information however much of the data and information hasn't been compared as the two regions are different.<br /><br />It becomes difficult to separate lifeform from geologic events both historically and current real time as the two perspectives are inter connected, relying on one another. You can concentrate on differences between the two different areas (west and east coast) geologic events that have and are still occuring. However where does that leave you as there are many differences between perspectives of geologic data and how it is acquired. IMO it is better to start with a lifeforms including human populations in order to attempt to explain differences between geologic data. Unless perhaps you have an actual study outlining geologic differences between two different areas. I feel you need to start with a premise to outlining a study with goals vs just randomly pointing out geologic differences between two different areas. I support pointing out geologic differences under the guise of an outlined study, along with various goals your trying to achieve.<br /><br />Anonymoushttps://www.blogger.com/profile/17517436217351640785noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-66027202511009952082016-11-20T10:38:16.195-08:002016-11-20T10:38:16.195-08:00I grew up on the West Coast, father inland on an I...I grew up on the West Coast, father inland on an Island within Puget Sound. The only access was by boat. I have had college friends who grew up in Newfoundland and the NE that I don't know well having only travelled through a few times. My coastal knowledge is mostly of the the Pacific NW including the Sand wan Islands. <br />Though I have travelled through various coastal towns, ocean beaches and forests along 101 all the way to the Mexican boarder. I'm no expert on the West Coast. As for historical knowledge I'm learning something new about the West Coast everyday.<br /><br />Puget Sound is protected by the Olympic Peninsula which includes the Olympic Mountains. Much of the Olumpic mountains were produced by plate techtonics i.e. pushing of land masses up against one another to create the Olympic Mountains. The last ICE age created much of the Puget Sound, parts of the NW, including many of the surrounding lakes to points where the effect of the ice age on the land masses eventually stops farther south.<br /><br />To obtain a good historical perspective of the West Coast you need first become aware of the coastal Native American tribes and their history. Having lived and survived along the West Coast for thousands of years provide IMO a better and more relevant perspective of how humans survived and still survive today along coastal regions.<br /><br />Much of the important parts of the West Coast coastline Extends up into Canada and then eventually into Alaska. For many years SE Alaska coastal living has effected areas farther south into Washington and Oregon. Many of the rain forests, some that still exist in SE AK were once prominent in Washington and Oregon, where much of the ancient rain forests including old growth forests have disappeared in a short amount of time. <br /><br />Forested areas from SE AK down to Northern California is considered to be a green belt. At one time around 100 years ago +/- the average age of this green belt wilderness was around 750 years. Meaning trees and undergrowth the average age of the forests was approx. ~750 years, where many trees and species were well over 1000 years old. Douglas fir at one time wasn't the prominent tree specicies. There were around eight prominent tree specicies along with ancient undergrowth. Over the years logging wiped out most of the old growth forests, replacing them with new hyrid growth of Douglas fir. Trees were genetically altered to produce a better type of tree for harvest and to go through the sawmills. <br /><br />Small areas of Old growth forests can still be found within certain National Parks, but most of the old forested areas are now gone along with many rivers and streams have dried up along with acncient undergrowth plant and animal species. Most having been around for thousands of years have disappeared within a short time span of around ~100 years.<br /><br /><br /><br /><br /><br /> Anonymoushttps://www.blogger.com/profile/17517436217351640785noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-34430269314503465292012-09-27T19:40:22.522-07:002012-09-27T19:40:22.522-07:00I should have added the answer to the www.tulane.e...I should have added the answer to the www.tulane.edu/~sanelson/geol204/coastalzones.htm link using search terms [why east west coastline differences] "The shape of the coast is controlled mainly by tectonic forces and climate..."<br /><br />SileEtt's mehttps://www.blogger.com/profile/03516643763025205799noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-89922052199212940232012-09-27T19:35:18.267-07:002012-09-27T19:35:18.267-07:00It took several tries, switching the terms around ...It took several tries, switching the terms around but I finally got a very definitive result with [why east west coastline difference] The answer was located at www.tulane.edu/~sanelson/geol204/coastalzones.htm <br /><br />SileEtt's mehttps://www.blogger.com/profile/03516643763025205799noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-28100282654998822332012-09-27T16:11:31.172-07:002012-09-27T16:11:31.172-07:00Alas, glaciers don't have anything to do with ...Alas, glaciers don't have anything to do with it... Dan Russellhttps://www.blogger.com/profile/13603209997260423532noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-65616463894654917702012-09-27T14:08:57.305-07:002012-09-27T14:08:57.305-07:00hope snoozing with the pigeons (OK, it isn't P...hope snoozing with the pigeons (OK, it isn't Paloma) isn't like sleeping with the fishes... maybe it's a kayak thing... or maybe something was lost in my rudimentary translation attempt... wait, now I see, it has to do with moose hybrids & knife edges - that makes more sense, but still a little Picasso-esque. zzzzzzzs are good. Keep an eye out for the Wana-games-ak until Kisosen finds you.<br />(Pamola - a bird and night spirit who takes prisoners to Alomkik, near Mt. Katahdin and causes cold weather)<br /><a href="http://www.martinries.com/images/PP07.jpg" rel="nofollow">Picasso minotaur</a><br /><a href="http://www.brycemuir.com/New%20Layout/LocalMyths/LocalMythPix/17Pamola/17Pamola.jpg" rel="nofollow">Moomangle</a><br /><a href="http://www.flickr.com/photos/dawoodford/7006934967/" rel="nofollow">Pamola's "Index" Finger</a> <br /><br />Thanks again for the GeoLesson (Kerguelen was before my time on sRs so it was good to go back and read that - always good to learn new stuff) - some doodles might be helpful - Dan & Goo have some experience with that - maybe next time he is in Boston you two could chat it over while paddling the Charles.<br />Checked the Climax Molybdenum/ Freeport-McMoRan Copper & Gold Inc. site - an impressive effort, but doesn't that set the stage for a Rocky Mt. high sink hole?<br />You might keep this in mind if the snowpack & runoff cooperate next spring & paddle what's left of this mountain/high desert pond:<br /><a href="http://www.denverpost.com/extremes/ci_18365747" rel="nofollow">the other Big Sur</a><br />remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-18101995427114883852012-09-27T11:22:51.923-07:002012-09-27T11:22:51.923-07:00Is it cheating to say "Glaciers" because...Is it cheating to say "Glaciers" because I know this from 5th grade? I'm from the east coast of Canada, which is tore up plenty (but she'll fly true).Nightingaylehttps://www.blogger.com/profile/05090140054954636498noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-10239303608410612992012-09-27T08:45:14.312-07:002012-09-27T08:45:14.312-07:00My second search string was "why are the east...My second search string was "why are the east and west coasts of north america so different geologically?" This was the top link:<br />http://science.kennesaw.edu/~jdirnber/oceanography/LecuturesOceanogr/LecGeology/LecGeology.html<br />Very detailed description with great visuals. The upshot is that the west coast is on the edge of 2 shifting tectonic plates while the east coast is far from any plate edges.<br />Took about a minute.<br />LHarrisCOhttps://www.blogger.com/profile/17978584160920307989noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-54430991840695085512012-09-27T08:14:42.529-07:002012-09-27T08:14:42.529-07:00Searched [north American continent formation coast...Searched [north American continent formation coasts] <br />Clicked Our Changing Continent, looked at pics, cntl-f coast. Saw Pangaea. Went back. Clicked Pangaea Wikipedia. Read/Saw north America was on the west edge of Pangaea and moving west. Blah blah blah. <br /><br />Then I remembered the more obvious reason. Search Genesis 1:1. <br /><br />Genesis 1:1. In the beginning, God created the heavens and the earth. … 1:9 And God said, "let the water under the heavens be gathered into one place, and let dry land appear." And it was so. 10 God called the dry land Earth, and the waters that were gathered together he called Seas. And God saw that it was good. <br />Gage & Serenahttps://www.blogger.com/profile/10384164211603616791noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-75882323197478188182012-09-27T07:01:39.171-07:002012-09-27T07:01:39.171-07:00I added [site:edu] to my search and found the answ...I added [site:edu] to my search and found the answer. I'm not sure if I comprehended it though. LOLJeff Dowdyhttps://www.blogger.com/profile/05467036959367582828noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-7203254665691726402012-09-27T06:26:20.575-07:002012-09-27T06:26:20.575-07:00Google's translation: Hello, my name is Eduar...Google's translation: Hello, my name is Eduardo, it started googling [east coast usa topography], finding everything related to the East Coast of the United States, added to the query term [origin coast] and reflects the origin google mentioning that the margin coast has to do with different caracteristicasd besides taking erosion, depth, etc.<br /><br />To the west coast follow the same steps and found that this coast is different for the barrel and the transform fault on the site.<br /><br />I hope my response was successful! Responding 17 minutes laterDan Russellhttps://www.blogger.com/profile/13603209997260423532noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-24593137115501968272012-09-27T05:52:49.009-07:002012-09-27T05:52:49.009-07:00A HHGTTG reference. Nice! A HHGTTG reference. Nice! Dan Russellhttps://www.blogger.com/profile/13603209997260423532noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-17881369148977513232012-09-27T05:42:43.028-07:002012-09-27T05:42:43.028-07:00Source: Honors Geologly classes in college, 1971-1...Source: Honors Geologly classes in college, 1971-1972. The West coast is an active tectonic plate boundary and in a constant (in geologic time) state of change. It is very young. There is a combination of strike/slip faults as the Pacific plate rotates to the North, and other faults uplifting the coastal mountains. The East coast is much older and generally stable - is is nearing old age. The area between the coast and mountains is sedimentary deposits from erosion of the Appalachian Mountains chain --which used to be at least as high as the Rockies. The sediment is slowly compacting, subsiding and eroding, and ocean erosion is wearing away the coast. Coastal islands are a result of those processes. The nearest tectonic boundary is the Mid-Atlantic Ridge, which is spreading instead of sliding. The majority of earthquakes in the East are relaxation of pressure from the most recent Ice Age, or to accomodate pressure from new sedimentation. However, as they happen within a continental plate, they tend to be felt over a much wider area, with vibrations simiar to ringing a large bell. Anonymoushttps://www.blogger.com/profile/01542954924634499952noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-39467043194933647292012-09-27T02:26:55.947-07:002012-09-27T02:26:55.947-07:00Time: About 10 seconds
Search string: "east ...Time: About 10 seconds<br /><br />Search string: "east coast" "united states" barrier islands<br /><br />Source: "Coastal Encounters," National Park Service, http://www.nps.gov/cuis/forteachers/upload/Coastal%20Encounters.doc<br /><br />Answer: "This is due to plate tectonics. The United States is on the North American plate which is moving in a Northwesterly direction. The West coast is the leading edge and the East coast is the trailing edge. Barrier islands form on the trailing edge.<br /> <br />"The Pacific plate (mainly under the Pacific Ocean) and the North American plate meet on the West coast at what is called a subduction zone. This is where one plate is sliding under the other. Any sediments that are carried to the ocean move across the narrow continental shelf (approximately 20 miles wide) and fall into this area. There is no accumulation and therefore no barrier islands.<br /> <br />"On the trailing edge (the East coast) sediments carried to the ocean have a broad plain to accumulate on. New land is being formed at the mid-oceanic ridge as the plate moves and a wide continental shelf is created. The continental shelf off the coast of Georgia is approximately 80 miles wide. Thus, barrier islands have space and sand supply to form."<br />Marthahttps://www.blogger.com/profile/17049981347496279180noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-50944113736694234442012-09-27T01:43:33.386-07:002012-09-27T01:43:33.386-07:00Thanks, the Kerguelen Islands question was one of ...Thanks, the Kerguelen Islands question was one of the more fun ones, as I remembered the story and the location of the islands, but not how to spell them (Boeing was just from typing fast)! That time I had to start with using Google Earth to 'go there' and find the name which + india and terrane pulled it up.<br /><br />Anytime H2O and land interact forcefully it's cool, though for things like this they are probably a lot better explained with a drawing (on the side of a van or bottom of a kayak), and a lot of other ones can be explained with little demos in the dirt or on beaches. I probably should scan some doodles of explanations like that.<br /><br />Roughly if its past ~ 40º N or S and isn't some interior plains region I'll probably be all over it. Probably not sandhog questions as the underground shot is actually from the Henderson Molybdenum Mine in the mountains of Colorado, where they are going after the orebody from underneath. As they blast out chunks it with the rest of the body sufficiently weakened, it naturally falls into their buckets. Think breaking an hourglass in half and catch the sand as it comes out the bottom, rather than trying to get on top of it and dig down in. <br /><br />Right now it ain't Dirigo, it's more 'Pamola dirige me ad somnum'.Alex Kerneyhttps://www.blogger.com/profile/05540799266858845177noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-52654022545767702402012-09-26T20:52:36.666-07:002012-09-26T20:52:36.666-07:00This is due to plate tectonics.
About 15 min. Star...This is due to plate tectonics.<br />About 15 min. Started with: why does east coast have barrier islands did not get much useful. <br />This: no barrier islands west coast<br />Got: https://docs.google.com/viewer?url=http%3A%2F%2Fwww.nps.gov%2Fcuis%2Fforteachers%2Fupload%2FCoastal%2520Encounters.doc<br />Which gave a good explanation.Danahttps://www.blogger.com/profile/08192634578752866239noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-31564673992777542572012-09-26T17:37:10.861-07:002012-09-26T17:37:10.861-07:00Because Slartibartfast thought they looked good, a...Because Slartibartfast thought they looked good, and the mice approved. He did save his best work for Norway, though.The Grey Manhttps://www.blogger.com/profile/14619451007363662815noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-83091299259551931572012-09-26T17:19:40.355-07:002012-09-26T17:19:40.355-07:00West coasts in general have deserts. Run your eye...West coasts in general have deserts. Run your eye along a latitude close to Capricorn thru. S. America, Africa and Madagascar and Australia. Each land mass has desert on the west coast and tropical wet shorelines on the east coasts. In the N hemesphere it is more difficult to see but the west coasts are California/Portugal (Morocco). The answer to the question has to do with how our weather systems work (trade wind bands with offshore flow in the west compared to counter flows and onshore flows in the east). Rainfall creates large rivers on east coasts leading to deltas and muddy estuaries. Path followed to get answer = grade 4 geography that only really ment something when you actually stand on these coastlines.2sensehttps://www.blogger.com/profile/06332376335081354656noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-62301629033750994802012-09-26T17:09:31.047-07:002012-09-26T17:09:31.047-07:00nice explanation - impressive grey matter RAM
that...nice explanation - impressive grey matter RAM<br />that CC education seems to have paid off as you seem to have developed your own onboard Goo resource.<br />Between your explanation and Judith's (below) I have a better understanding of the areas where land and water meet...<br />Guessing if Dan poses an Antarctic/ Patagonia search you will be on top of that one too...& maybe even sandhog questions? <br />anyway, thanks & fwiw: in your "5 Ws about", it's Boeing... unless that's some sort of Airbus pwned thing...✈ Dīrigō remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-85445764684525889532012-09-26T14:35:13.932-07:002012-09-26T14:35:13.932-07:00Google: why are there barrier islands on the east ...Google: why are there barrier islands on the east coast but not the west<br /><br />Second result: http://www.msc.ucla.edu/oceanglobe/pdf/SandyBeachesEstuary/Sandy_Intro.pdf<br /><br />searched in the document for "west"<br /><br />lead me to the section: "The 4 types of estuaries are:" which explains the differences between the east and west coasts.<br /><br />It took a few minutes all told.Anonymoushttps://www.blogger.com/profile/12876392964133225128noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-10336509566396679132012-09-26T14:09:53.070-07:002012-09-26T14:09:53.070-07:00Is it because the fault line of the Juan de Fuca p...Is it because the fault line of the Juan de Fuca plate against the North American plate is much much closer the the coastline of the west coast, whereas the North American Plate extends far out into the Atlantic Ocean.<br /><br />As a result, the sea drops off quite quickly on the west coast, making it much less likely for islands to form sedementarily, whereas on the east coast sediments shift and form islands more readily in the shallows of the near Atlantic.<br />marvelouspersonahttps://www.blogger.com/profile/03085422575160113281noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-6534873846435127012012-09-26T13:58:45.142-07:002012-09-26T13:58:45.142-07:00google: "coastal geomorphology east vs. west&...google: "coastal geomorphology east vs. west". result: http://geology.uprm.edu/Morelock/morphol.htm<br /><br />basically: west coast = subduction/compression, east coat = divergence/expansion-KYhttps://www.blogger.com/profile/08310863964665694156noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-66228999845748136232012-09-26T13:53:45.055-07:002012-09-26T13:53:45.055-07:00There is a fairly sharp fall-off in the continenta...There is a fairly sharp fall-off in the continental shelf of the west coast, whereas the east coast has a longer, more gradual drop-off.<br /><br />I used Google Earth, and it took about 30 seconds, including the time to install the plugin.Calciphushttps://www.blogger.com/profile/05098009052814730904noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-59954278015080798912012-09-26T13:48:55.199-07:002012-09-26T13:48:55.199-07:00Is it more complicated than the kind of topography...Is it more complicated than the kind of topography that the west coast's thrust tectonics creates vs. the east coast's extensional tectonics?<br /><br />I suppose if you wanted to include the vegetation near the coast that'd add the clockwise motion of the northern hemisphere's ocean.Paulhttps://www.blogger.com/profile/06594520646680280230noreply@blogger.comtag:blogger.com,1999:blog-4953008377950396317.post-6365776383900826032012-09-26T13:42:53.185-07:002012-09-26T13:42:53.185-07:00Dan - forgot to mention that I started my search w...Dan - forgot to mention that I started my search with <i>Siri</i>... she didn't have much to say about the east coast other than it was a good place to build glass stores. She then showed me a map of said coast - apparently it is somewhere near Del Rio, Texas, mmm... anyway, she must have known I was on your site as she reminded me SEPs (search engine people) tend to have a different sense of humor and that she missed her GooPals and hoped things went well in Tokyo.<br />Sometimes she loses focus or emanates from a different tangent, but I like the way she says it.<br />about 5 mobile minutes/traffic started to move.<br /><br />curious about the source of friend's maps... could/would you show pics?<br />were they silhouettes? B&W is a perception/conception alterer.<br /><a href="http://ars.els-cdn.com/content/image/1-s2.0-S1052514908000907-gr4.jpg" rel="nofollow">flood plains & deltas</a><br /><a href="http://ohsobeautifulpaper.com/wp-content/uploads/typepad/beautifulpaper.typepad.com/.a/6a00e554ee8a22883301310f90be30970c-800wi.jpg" rel="nofollow">missing islands</a>remmijhttps://www.blogger.com/profile/17985809654574916217noreply@blogger.com