Geology Reference
In-Depth Information
Table 1.1 Ages of potassic rocks from different localities
Sl.
Locality
Rock types
Age
1.
Leucite Hills, Wyoming, U.S.A.
Lamproite
1 Ma
2.
Navajo Province, Arizona, U.S.A.
Minette
28
19 Ma
-
3.
Dulce dyke swarm, New Mexico,
Colorado, U.S.A.
Minette
27
26 Ma.
-
4.
Two Butte, Colorado, U.S.A.
Minette
35 - 27 Ma
5.
Central Sierra, Nevada, California,
U.S.A.,
Minette
3.8
3.4 Ma
-
6.
ElkheadMts, U.S.A
Minette
10
8Ma
-
7.
Colima Graben, Mexico
Minette,
Pliocene-present
8.
Alto-Paranaiba, Brazil
Kamafugitic rocks
57 + 0.06
9.
Matheson, Ontario, Canada
Minette
2.7 Ga
10.
Gaussberg, Antarctica
Lamproite
Holocene
11.
Virunga province, Zaire and Ruanda
Leucitetephrite
3 Ma-Present
12.
Vera, SE Spain
Lamproite
Late Miocene,
17-6 Ma
13.
Roman Province Italy
K-rich volcanics
1.3 Ma-Present
14.
Scotland and Northern England
Minette
Late Silurian-
Early Devonian
15.
Devon, SW England
Lamproite
Stephanian
16. Western Alps, Switzerland, Italy
Minette
33
29 Ma
-
17.
Aeolian Arc
K-rich volcanics
1 Ma
5.7 × 10 5
- 3 × 10 5
years B.C
18.
East Eifel, Germany
K-rich volcanics
19.
Muriah, Indonesia
K-rich volcanics
Late Pliocene
20. Wudalianchi, Erkeshan and Keluo,
N.E. China
Leucite-tephrite tephri-
phonolite
9.6
7.0 Ma
-
21.
Lingzizong, Tibet
K-rich volcanics
50 + 1
22.
Tristan Da Cunha, Island
K-rich volcanics
Recent
23.
Utsuryo Island
K-rich volcanics
Recent
24.
Tezhser alkali complex, former
U.S.S.R.
K-rich volcanics
39 - 37 Ma.
25.
Artem, former U.S.S.R.
K-rich volcanics
Neogene
26.
Ussuri, former U.S.S.R.
K-rich volcanics
Neogene
27.
Tokko complex, former U.S.S.R.
K-rich volcanics
Quaternary
28.
Pkhrutski massif, former U.S.S.R.
K-rich volcanics
Eocene
29.
Talyshskii zone, former U.S.S.R.
K-rich volcanics
Eocene
30.
Pyatistennyl, former U.S.S.R.
K-rich volcanics
Palaeogene
31.
Pamir, former U.S.S.R.
K-rich volcanics
Palaeogene
32.
Sandyk massif, former U.S.S.R.
K-rich volcanics
Permian
33.
Irisu complex, former U.S.S.R.
K-rich volcanics
Quaternary
(continued)
 
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