# data[].attributes.attachment_link.readable_text
Shaded relief map of United States, highlighting National Park Service lands at Divergent Plate Boundaries. Letter codes are abbreviations for park names listed on Tectonic Settings pages linked below.
Modified from "Parks and Plates: The Geology of our National Parks, Monuments and Seashores," by Robert J. Lillie, New York, W. W. Norton and Company, 298 pp., 2005, www.amazon.com/dp/0134905172

As a plate capped by thick continental crust pulls apart, the crust thins and elevates a broad region. These forces result in long mountain ranges, intervening valleys (basins) and volcanic activity characteristic of the Basin and Range Province and Rio Grande Rift. Ancient continental rifting formed similar rocks and geological structures in the Keweenawan Rift of the upper midcontinent region.

Divergent Plate Boundary Development

# data[].attributes.attachment_link.title
Divergent Plate Boundaries - Geology (U.S. National Park Service)

# data[].attributes.attachment_link.description
As a plate capped by thick continental crust pulls apart, the crust thins and elevates a broad region. These forces result in long mountain ranges, intervening valleys (basins) and volcanic activity characteristic of the Basin and Range Province and Rio Grande Rift.