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Gravestones Talking through Time

Date:
December 15, 2009
Source:
The Geological Society of America
Summary:
A visit to your local graveyard can provide not only a history lesson, but a science lesson as well. Historians have long scoured old burial sites to piece together the stories of those who rest there, but today scientists are learning much more from those letters carved in stone. Gravestones are telling the story of changes in Earth’s atmospheric chemistry and rainfall. Moreover, scientists are asking for your help to read the stones.

EarthTrek draws upon the local citizenry to build global information databases. Here, Canadian student Pascal records data from a gravestone in Sydney, Australia, as part of the EarthTrek Gravestone Project.
Credit: Image courtesy of The Geological Society of America

A visit to your local graveyard can provide not only a history lesson, but a science lesson as well. Historians have long scoured old burial sites to piece together the stories of those who rest there, but scientists are now learning much more from those letters carved in stone. Gravestones are telling the story of changes in Earth's atmospheric chemistry and rainfall. Moreover, scientists are asking for your help to read the stones.

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The iconic white marble headstones found in most graveyards around the world are wonderful diaries of changes in the atmosphere. Chemical interactions occur between the marble and the atmosphere over time. Little by little, atmospheric gases dissolved in rain drops cause the marble to erode. Changes in atmospheric chemistry also change the rate at which the marble weathers.

By accumulating volunteers' measurements of marble gravestones of different ages around the world, scientists hope to produce a world map of the weathering rates of those gravestones and thereby deduce how the atmosphere has been changing.

Participants are asked to take measurements using simple calipers and GPS, following a set of scientific protocols that are explained online. Data is then logged by participants directly into the scientific database via the project Web site.

The project is part of the new global citizen science program called EarthTrek, which is administered by The Geological Society of America in partnership with organizations across America and around the globe. People interested in participating can register online and follow links to the Gravestone Project or any of several other scientific research projects currently underway through the EarthTrek program.

"Being involved in EarthTrek provides people with the opportunity to be involved in real scientific research," says Gary Lewis, EarthTrek Director.


Story Source:

The above story is based on materials provided by The Geological Society of America. Note: Materials may be edited for content and length.


Cite This Page:

The Geological Society of America. "Gravestones Talking through Time." ScienceDaily. ScienceDaily, 15 December 2009. <www.sciencedaily.com/releases/2009/12/091209193159.htm>.
The Geological Society of America. (2009, December 15). Gravestones Talking through Time. ScienceDaily. Retrieved April 2, 2015 from www.sciencedaily.com/releases/2009/12/091209193159.htm
The Geological Society of America. "Gravestones Talking through Time." ScienceDaily. www.sciencedaily.com/releases/2009/12/091209193159.htm (accessed April 2, 2015).

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