Donald Lee Johnson
Biographic Data
| ID | 5590927 |
|---|---|
| NAME | Donald Lee Johnson |
| GIVEN NAMES | Donald Lee |
| FAMILY NAME | Johnson |
| SIGNATURE | JOHNSON D L |
| AFFILIATIONS | Department of Geography University of Illinois Urbana, Illinois 61801 |
| VERIFIED | No |
| TOTAL WORKS | 9 |
| TOTAL CITATIONS | 13 |
| AUTHOR COUNT | 9 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1974 |
| LATEST PUBLICATION YEAR | 1981 |
| H-INDEX | 2 |
More Comments on the Northern Channel Islands Mammoths
The Origin of Island Mammoths and the Quaternary Land Bridge of the Northern Channel Islands, California
Pygmy proboscidean remains of Mammuthus exilis occur abundantly in late Quaternary deposits on the Northern Channel Islands, California. On the assumption that ancestral elephants could not have swum to the islands and must therefore have walked out, various land bridges have been hypothesized that link the northern islands to the mainland by a peninsula. Geological evidence for a land bridge, however, is lacking, and new evidence shows that elep…
A Survey of Disturbance Processes in Archaeological Site Formation
The California Ice-Age Refugium and the Rancholabrean Extinction Problem
The question of what caused the late Quaternary extinction of the Rancholabrean fauna in the California glacial refugium is examined. In the absence of significant climatic and other natural environmental change, man was probably the principal agent of extinction in California. This extinction event marked the beginning of a long history of environmental impact in the area by humans.
The Late Quaternary Climate of Coastal California
The present Mediterranean climate of coastal California is unique in North America and reflects the interaction of several important synoptic controls, principally the North Pacific semipermanent anticyclone, and to a lesser extent the Aleutian low-pressure system and the cool California oceanic current. These synoptic climatic controls, key parts of the global air-sea circulation, were probably operative throughout late Quaternary time as shown …
The Effects of Frost Heaving on Objects in Soils, II
Recent laboratory studies of frost heaving of artifacts in soils are relevant to archaeologists, geomorphologists, and Arctic and Alpine specialists. Investigations were undertaken to determine the susceptibility to frost heave of artifacts with differing effective heights (the vertical dimension of buried objects). To this end, wooden dowels oriented from 0 to 90 degrees from the horizontal and vertically oriented wooden parallelepipeds of diffe…
A Mobile Storage And Display Cabinet For Soil Monoliths
A specially designed, wheeled cabinet solves the dual problem of display and storage of soil monoliths. Up to thirteen monoliths at a time may be displayed, and up to 72 can be stored.Constructional details of the modestly priced unit are given, and functional features described
A Portable Coring Device for Rapid Site-Sampling
A portable hydraulic coring device facilitates rapid sampling of archaeological sites and collection of undisturbed sediment monoliths for reference in research and teaching. The modestly priced device may be used in dense forests or on terrain unsuited to more expensive, truck-mounted rigs
The Effects of Frost-Heaving on Objects in Soils
Frost-heaving of natural and cultural materials occurs in soils whenever soil temperatures drop below freezing and the soils are moist. Frost-heaving is greatest in imperfectly drained, silt-textured, porous soils, at shallow depths, when rate of frost penetration is slow and when no vegetation or snow cover is present. The density, size, shape, orientation, and thermal properties of materials also affect the rate of frost-heaving. Because the mo…
The Effects of Frost-Heaving on Objects in Soils
Frost-heaving of natural and cultural materials occurs in soils whenever soil temperatures drop below freezing and the soils are moist. Frost-heaving is greatest in imperfectly drained, silt-textured, porous soils, at shallow depths, when rate of frost penetration is slow and when no vegetation or snow cover is present. The density, size, shape, orientation, and thermal properties of materials also affect the rate of frost-heaving. Because the mo…
The Effects of Frost Heaving on Objects in Soils, II
Recent laboratory studies of frost heaving of artifacts in soils are relevant to archaeologists, geomorphologists, and Arctic and Alpine specialists. Investigations were undertaken to determine the susceptibility to frost heave of artifacts with differing effective heights (the vertical dimension of buried objects). To this end, wooden dowels oriented from 0 to 90 degrees from the horizontal and vertically oriented wooden parallelepipeds of diffe…
A Portable Coring Device for Rapid Site-Sampling
A portable hydraulic coring device facilitates rapid sampling of archaeological sites and collection of undisturbed sediment monoliths for reference in research and teaching. The modestly priced device may be used in dense forests or on terrain unsuited to more expensive, truck-mounted rigs
The Effects of Frost-Heaving on Objects in Soils
Frost-heaving of natural and cultural materials occurs in soils whenever soil temperatures drop below freezing and the soils are moist. Frost-heaving is greatest in imperfectly drained, silt-textured, porous soils, at shallow depths, when rate of frost penetration is slow and when no vegetation or snow cover is present. The density, size, shape, orientation, and thermal properties of materials also affect the rate of frost-heaving. Because the mo…
A Portable Coring Device for Rapid Site-Sampling
A portable hydraulic coring device facilitates rapid sampling of archaeological sites and collection of undisturbed sediment monoliths for reference in research and teaching. The modestly priced device may be used in dense forests or on terrain unsuited to more expensive, truck-mounted rigs
A Mobile Storage And Display Cabinet For Soil Monoliths
A specially designed, wheeled cabinet solves the dual problem of display and storage of soil monoliths. Up to thirteen monoliths at a time may be displayed, and up to 72 can be stored.Constructional details of the modestly priced unit are given, and functional features described
The California Ice-Age Refugium and the Rancholabrean Extinction Problem
The question of what caused the late Quaternary extinction of the Rancholabrean fauna in the California glacial refugium is examined. In the absence of significant climatic and other natural environmental change, man was probably the principal agent of extinction in California. This extinction event marked the beginning of a long history of environmental impact in the area by humans.
The Late Quaternary Climate of Coastal California
The present Mediterranean climate of coastal California is unique in North America and reflects the interaction of several important synoptic controls, principally the North Pacific semipermanent anticyclone, and to a lesser extent the Aleutian low-pressure system and the cool California oceanic current. These synoptic climatic controls, key parts of the global air-sea circulation, were probably operative throughout late Quaternary time as shown …
The Effects of Frost Heaving on Objects in Soils, II
Recent laboratory studies of frost heaving of artifacts in soils are relevant to archaeologists, geomorphologists, and Arctic and Alpine specialists. Investigations were undertaken to determine the susceptibility to frost heave of artifacts with differing effective heights (the vertical dimension of buried objects). To this end, wooden dowels oriented from 0 to 90 degrees from the horizontal and vertically oriented wooden parallelepipeds of diffe…
The Origin of Island Mammoths and the Quaternary Land Bridge of the Northern Channel Islands, California
Pygmy proboscidean remains of Mammuthus exilis occur abundantly in late Quaternary deposits on the Northern Channel Islands, California. On the assumption that ancestral elephants could not have swum to the islands and must therefore have walked out, various land bridges have been hypothesized that link the northern islands to the mainland by a peninsula. Geological evidence for a land bridge, however, is lacking, and new evidence shows that elep…
A Survey of Disturbance Processes in Archaeological Site Formation
More Comments on the Northern Channel Islands Mammoths
Geology (8 works) · Archaeology (4 works) · Ecology (4 works) · Geography (4 works) · Paleontology (4 works) · Biology (3 works) · Geology (3 works) · Geology and Paleoclimatology Research (3 works) · Geomorphology (3 works) · Geotechnical engineering (3 works)