Classification of Dartmoor Tors
Abstract
Fifty-eight Dartmoor tors were evaluated with respect to hypotheses generated to classify granite landforms using field and laboratory measurements of joint type, joint spacing, rock grain size, and rock texture. Landforms on Dartmoor were classified topographically as summit, spur and valleyside tors. The data were evaluated using: (1) non-parametric correlations, (2) joint spacing frequency distributions (3) variable spatial distributions, and (4) principal coordinates analyses and non-hierarchical classification. Each tor type was defined by each procedure; definitions were similar, but not identical. These definitions were then compared to the hypotheses. Three hypotheses describe landforms on Dartmoor. An additional hypothesis is indirectly supported because, where the landforms are rare or non-existent, so are their characteristics. These hypotheses, which all describe summit tors, were revised using the combined results of the four approaches; new hypotheses were generated for spur and valleyside tors. Only characteristics common to several procedures and not contradicted by other results were used.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1992
- Accession Number
- ADA257191
Entities
People
- Judy Ehlen
Organizations
- Army Geospatial Center