San Juan, Puerto Rico road and buildings. 1922.

Album caption: Along the road behind the Capitol. El Morro is the tall structure in the distance. La Perla is below the road. San Juan. No index card.

Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Kilmartin, J.O. Collection, Photographers, Puerto Rico, photo print

Photomicrograph of a common type of granite porphyry just east of Browns Rock. Clearwater County, Idaho. circa 1957.

Album caption: Photomicrograph of a common type of granite porphyry just east of Browns Rock. Phenocrysts are quartz (Q), orthoclase (or), and plagioclase (pl); the groundmass, which consists of these minerals plus a small amount of biotite, is fine to medium grained. Narrow rims of granophyric intergrowth of quartz and orthoclase are common around the quartz phenocrysts. Clearwater county, Idaho. circa 1957. Published as figure 15A in U.S. Geological Survey. Professional paper 344-D. 1963.

Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clearwater County, Idaho, Image, Photographers, Photographers, photo print