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Three prominent closed gravity minima along the south edge of the study area may reveal underlying calderas, which are masked by younger Tertiary rocks. The largest possible caldera is about 10.52 by 15.5 mi (17 by 25 km) in size, and, if the assumed underlying tuffaceous sedimentary rocks are, on the average, 0.2 g/cm3 less dense than the surrounding volcanic rocks, the caldera extends to a depth of about 1.7 mi (2.7 km). The areas along the edges of the postulated calderas are considered sites for possible future mineral exploration.

and

In the southwestern part of the Range, gravity and magnetic anomalies of substantial size suggest the possible existence of a caldera or buried pluton. The widespread geochemical anomalies in this area are similar in size and magnitude to the mineralized McDermitt Caldera approximately 82 mi (132 km) to the northwest in the Opalite mining district. Whether a caldera or buried pluton is present in the area, the geochemical data suggest that area C shown on figure 2 has a possible potential for concealed mercury and complex precious metal sulfide deposits.

Also, the link to the McDonalds reference is: http://www.datapointed.net/201...

Citation provided. There was even a Slashdot article about it.
In 2010 the McFarthest Spot in the contiguous 48 United States was a patch of Nevada dirt some 115 miles from the nearest McDonald's. Doubtless this has changed since then, but I can't find anything more recent.

As this graph shows, regardless of the genre, sequels are usually worse than the original.

If you want to know who it is harming most, check this out. I'll give you a hint, it is not the Americans.

I haven't poked at the actual data, but just by looking at the map for 2009...
http://www.datapointed.net/visualizations/maps/distance-to-nearest-mcdonalds/ ...and then the one for 2010...
http://www.datapointed.net/visualizations/maps/distance-to-nearest-mcdonalds-sept-2010/ ...aside from seeing a bunch of new restaurants opening, a bunch of restaurants shifting (corrections in data or stores moving locations), there's the one obvious 'big blob' one that disappears near the west coast. But not in California, I guessed.

Overlaying it on Google Maps...
You need to rotate the map CCW a fair bit.. just match up LA, SF and SLC and if you search for "McDonald's" the blobs from the map should line up with several of the Google Maps blips along the I80 - e.g. at Winnemucca, Battle Mountain and Elko ...the big blob that disappeared actually seems to be centered on the location at Tonopah...
http://maps.google.com/maps?q=mcdonald's&ll=38.153997,-117.004395&spn=1.187873,2.469177&z=9&iwloc=A&layer=c&cbll=38.056254,-117.216531&panoid=0l-zQQd6AtlI4McY-UjHkg&cbp=12,47.78,,0,5.25 ...which is in Nevada, not California.

Any Tonopahians around?

I haven't poked at the actual data, but just by looking at the map for 2009...
http://www.datapointed.net/visualizations/maps/distance-to-nearest-mcdonalds/ ...and then the one for 2010...
http://www.datapointed.net/visualizations/maps/distance-to-nearest-mcdonalds-sept-2010/ ...aside from seeing a bunch of new restaurants opening, a bunch of restaurants shifting (corrections in data or stores moving locations), there's the one obvious 'big blob' one that disappears near the west coast. But not in California, I guessed.

Overlaying it on Google Maps...
You need to rotate the map CCW a fair bit.. just match up LA, SF and SLC and if you search for "McDonald's" the blobs from the map should line up with several of the Google Maps blips along the I80 - e.g. at Winnemucca, Battle Mountain and Elko ...the big blob that disappeared actually seems to be centered on the location at Tonopah...
http://maps.google.com/maps?q=mcdonald's&ll=38.153997,-117.004395&spn=1.187873,2.469177&z=9&iwloc=A&layer=c&cbll=38.056254,-117.216531&panoid=0l-zQQd6AtlI4McY-UjHkg&cbp=12,47.78,,0,5.25 ...which is in Nevada, not California.

Any Tonopahians around?