Geology Term of the Day: Terrane

Terrane, not Terrain. More specifically a tectonostratigraphic terrane

In geology terrane is a block of the Earth’s crust from one tectonic plate that get attaches (accretes) to another plate. A piece of the earth’s crust that differs from the surrounding material, and is separated from it by faults.

Where are they found?

All over California, dude. All over.

Example? Part of Ben Lomond Mountain in California is part of the Salinian Block that is found parts of Santa Cruz County, the Monterrey Peninsula, Bodega Head, Point Reyes and the Farallon Islands. The source of these rocks? The Sierra Nevada Mountains… at least 150 miles to the southeast of the Bodega Bay. How did they get there? After being sliced off the Sierra Nevadas they moved along the San Andreas Fault guided in part by the Big Pine and Nacimiento Faults.

Farallon Islands photo by NOAA

Why does this matter? Ben Lomond Mountain is an AVA which is located on this geological intrusion. Kinda makes the area different from the surrounding terrain, doesn’t it?

This Wine Might Be Past its Prime

A couple of years ago, I saw an article about the discovery of the oldest wine ever discovered.  Found in Armenia it was made 6,100 years ago.  No. It was not liquid.

At the time I was amazed but as it was known that wine was originally produced in Georgia (not the Peach Tree State but rather the one in the Caucasus), I wasn’t really too surprised as Armenia is in that general area.

Now an announcement has been made that even earlier wine has been discovered and in Europe.  Found on an ancient mound on the Greek Drama plain, the site of ancient Dikili Tash has been undergoing excavation since the 1920s.  The last dig in begun in 2008 and completed in 2010 has continued to explore further back into time.

In an analysis of the pottery found on the site, showed evidence of tartaric acid which is sign of fermentation as well as carbonized grape seeds and skins.  Carbon dating indicates that this  wine was being produced 6,200 years ago.  That is 100 years earlier and nearly 1,400 miles to the west of the previously known discovery of early wine.

For more information:

http://www.huffingtonpost.com/2013/10/02/6000-year-old-wine-greece_n_4027039.html
http://www.iksis.fr/r-dikili-tash_fr.htm (in French)
http://www.dikili-tash.fr/content_en/recherche/prog3.htm (in French with English translation)

Gretchen Miller Neuman
VinoVerve Editor