Abstract
Analyses of rock varnish on Quaternary alluvial fans reveal that three cycles of fan development have been controlled by both climatic changes and tectonic activity. The most recent cycle of fan development, Q3, started before 50 000 BP and has continued to the present. A previous cycle, Q2, originated before 170 000 BP and ended after 105 000 BP. The earliest recorded cycle, Q1, started before about 800 000 BP and ended after 500 000 BP. -from Author
| Original language | English (US) |
|---|---|
| Pages (from-to) | 56-73 |
| Number of pages | 18 |
| Journal | National Geographic Research |
| Volume | 4 |
| Issue number | 1 |
| State | Published - 1988 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Environmental Science
- General Earth and Planetary Sciences