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water—and headed uphill. Dr. Tbllo, a fit and sprightly man in his early 50s, led the way. The three students, all 20-something, and I followed him up the steep slope. At age 69, I was by far the oldest and I had added a few pounds in the last 45 years, so I struggled to keep up with the youngsters.
We examined the outcrop. Although this rock was similar to -the one at the road, it helped fill in another blank spot on the map.
Fieldwork like this—examining outcrop after outcrop with rock hammer, hand lens, and compass—has been the core of geological research for more than a hundred years. It’s still the basis for much research today, but is usually complemented by other studies.
Rock samples were labeled to be carried back to the lab. There they would be carefully ground into thin sections to be examined under polarized light
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