Outcrop or artificial surface exposure, Diabase
| Geographic location |
-73.966667, 40.85
73°
58'
"
W,
40°
51'
"
N
Bergen county,
NJ
Central Park
1:24,000 scale map quadrangle
Accurate to within 1 minute (~1 mile)
|
|---|---|
| Source of sample | Outcrop or artificial surface exposure |
| Rock name | Diabase |
| Description | PALISADES SILL |
| Laboratories | Yale |
| Compiler name | Godoy, M.M. |
| Date compiled | 1978 07 |
| Precision of location | Accurate to within 1 minute (~1 mile) |
| Bibliographic reference | Armstrong, R.L., and Besancon, J., 1970, A Triassic Time Scale Dilemma: K-Ar Dating Of Upper Triassic Mafic Igneous Rocks, Eastern U.S.A. and Canada and Post-Upper Triassic Plutons, Western Idaho, U.S.A.: Eclogae Geologicae Helvetiae, v. 63, p. 15-28. |
| (click for info) | |
| Geologic map unit | -73.966667, 40.85 |
| Nearby scientific data | Find additional scientific data near this location |
| Age estimate | 196.66 ± 2Ma age of intrusion
|
|---|---|
| Type of analysis | conventional K-Ar 6.82%, 6.81%, 6.72%, 6.86% K; 54.5XE-6, 54.9XE-6, 55.4XE-6 STP CC RAD AR-40
|
| Rock or mineral analyzed | biotite |
| Analytical details | |
| Lab sample ID | 16 |
| Decay constants | 4.72E-04, 0.584E-04, 1.19E-04* |
| K2O concentration | 8.19 % |
| Radiogenic 40Ar concentration | 24.5 |
| Radiogenic Ar | 928195 % |