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Bev

Geologic Formation Maps tell us not only the geology of an area but they may also tell us whether that area is fossiliforous or not, and what geologic period it is in. But accessing that information, and the information itself, is far from standardized.

We all travel to some degree, whether from state to state, around a continent, or around the world. This is an international forum.

Wouldn't it be wonderful to access geologic maps from various states, provinces, countries, etc.? If you agree, please post your links to geologic formation maps on this thread, that we may all benefit and perhaps find a common way to access this information worldwide.

I will start. In Minnesota we have the "Minnesota Geologic Survey" through the University of Minnesota. This is a link to a county by county geologic survey for Minnesota. Just click on the county and, technically, you should get the formation maps which will tell you the time periods and whether or not the formation is fossiliferous and maybe even what fossils can be found there - it varies.

Note: They appear to be updating the information and attempting to standardize it, so not all counties are available. And I have found the site to be "stubborn" at times. :) But keep playing and you will get what you need.

http://www.mngs.umn.edu/county_atlas/countyatlas.htm

Bev :-D

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trilobiteruss

Well since I worked at the ISGS for 34 years til I retired in 2007, here are useful links:

Main page that gets you to all the map links (has new maps listed on this main map page):

http://www.isgs.illinois.edu/?q=maps

Bedrock Geological Quadrangle maps

http://www.isgs.illinois.edu/maps/isgs-quads/bedrock

All quadrangle geological maps (surgical, bedrock, just zoom and click)

http://www.isgs.illinois.edu/?q=maps/isgs-quads

Surficial Geology Maps (bedrock, soil, glacial)

http://www.isgs.illinois.edu/maps/isgs-quads/surficial

russ

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JohnJ

Very useful information. ;)

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Bev

Auspex mentioned the potentional for broken links. If you can tell us how you found the geologic formation maps for your area, that may even be more helpful! I did a search for "geologic formation maps Minnesota". After clicking all over the place I finally found how to get them by county.

Also, I would be willing to help any TFF member who comes to southeastern Minnesota as much as I can to have a successful hunt.

Bev :)

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Plantguy

http://tapestry.usgs.gov/states/Default.html

This link is THANKS TO WILLIAM!

A beautiful and useful geologic and topographic marriage for each state in the Union. :)

Hi Bev, The USGS has a wealth of information at their www.usgs.gov site, both maps and pubs. .

The link below takes you to a map of the US which allows you to drill into many of the individual states maps.

post-1240-0-26086400-1378955386_thumb.jpg

http://ngmdb.usgs.gov/maps/mapview/

Regards, Chris

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Ludwigia

I find this is really helpful to collect this information in one thread. Thanks, Bev! Glad to see that the admins have already pinned it. Here are a couple of things from Europe which could be helpful. Great Britain is understandable, but for the German one you'll need either the native language or google translator.

http://www.southampton.ac.uk/~imw/

http://www.bgr.de/app/litholex/index.php

It's also sometimes frustrating to correlate formations on a global basis. The international Commision on Stratigraphy has updated its chart this year and also offers some more specific ones:

http://www.stratigraphy.org/index.php/ics-chart-timescale

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Bev

WOW! Super information GUYS!!! Lots to play with here! :-D

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PennyT.

great idea, Bev, thanks to you and everyone here for sharing

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PennyT.

Grrr, government shut-down means web sites down, too.

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Neoceras

Here is a Geological Map of the Philippines

from an article called:

PHILIPPINE GEOLOGY AND MINERALIZATION: AN OVERVIEW

which was found on this website:

http://kalibo.tukcedo.nl/

I think it describes ancient magmatic arcs in the Philippines, which would all be igneous or metamorphic, and hence, not the sedimentary rocks relevant to fossils. Still, it seems to be meant for describing mineral resources. I don't come across this stuff very often and so wanted to share it, especially if someone else can tell me more about it.

post-12683-0-47422500-1381099750_thumb.jpg

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Neoceras

Here is a map of tectonic plates of the Philippines I found very useful in my studies.

It is from the following paper, courtesy of the Philippine Journal of Science:

Georesistivity Signature of Crystalline Rocks in the Romblon Island Group, Philippines

Leo T. Armada, Carla B. Dimalanta, Graciano P. Yumul, Jr., and Rodolfo A. Tamayo, Jr.

Tectonics and Geodynamics Group, National Institute of Geological Sciences
University of the Philippines, Diliman, Quezon City, Philippines 1101

http://philjournalsci.dost.gov.ph/vol138no2/georesistivity%20signature%20of%20crystalline%20rocks%20in%20the%20romblon%20island.html

The area circled in red is the Romblon Island Group, which is situated within an arc-continent collision zone. The yellow shaded region is the Palawan Microcontinental Block, and the gray shaded region is the Philippine Mobile Belt.

The map is really useful in understanding the formation of certain islands in the Philippines. As I read more about the geological history of the place, the more I realized I needed a good map to understand all the concepts they were talking about.

post-12683-0-07490500-1381101202_thumb.jpg

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XZY

I use a paper geological map for my fossil / rock hunting, but I am wondering if any of you have come across an "app" for geological maps. In my line of work, I use an app called "Avenza pdf Maps". It is great......I use it on my smartphone and can download the map of the area we are working in ( eg - a logging cutblock map as provided from my employer), and it will give me my location on the map at all times via satellite. Is there such a thing out there for geological maps..?

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Herb

almost every state has a geological survey, ie...Kentucky geological survey. just search for the state you want.

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ckmerlin

Hi Bev great subject heres a link to The U.K BGS website map viewer http://www.bgs.ac.uk/data/mapViewers/home.html

I use this quite a lot it has useful tools such as map layers where you can change from satellite view to road map , also you can view solid and drift or just solid /or just drift , other features include being able to zoom in to 1:50000, and borehole location information

this is also available as an android phone app called igeology

heres an example of borehole information found using links from BGS map viewer http://mapapps.bgs.ac.uk/GeoRecords/GeoRecords.html comes up when you click on borehole on geology map , then http://scans.bgs.ac.uk/sobi_scans/boreholes/141381/images/10179161.html

actual borehole information , in the borehole information you can see where they have found fossils and what type they have found

very useful site indeed

Edited by ckmerlin

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Bev

http://www.sdgs.usd.edu/geologyofsd/geosd.html

I am currently doing some research on South Dakota because the famous Hell Creek formation extends into it. Above is a link I found by doing a search entitled "South Dakota Geologic formations". This link has a phenomenal amount of information if you click around it.

Here is a link to some fossil hunting sites in South Dakota. I think the data is very old, but useful in general.

http://www.fossilsites.com/STATES/SD.HTM

Edited by Bev

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