Brook Run Jasper
Description of Physical Characteristics:
Color: Brook
Run Jasper ranges from a mustard yellow to a yellowish brown or red with
white quartz streaks running through the material.
Texture: Fine grain
Luster: Glassy
Translucency: Opaque
Silica Fabrics / Fossils:
Patina:
Heat Treatment:
Knapping:
Distribution:
Distribution Comments:
Brook Run Jasper primarily occurs in as a bed between red sandstone or
siltstone in Culpepper County, Virginia. Seams can contain large
pieces of angular jasper in a black chert matrix.
Other Pictures:
Pictures Provided By:
References: (See
Reference Page):
Monaghan et al, (2004)
Stevenson et al, (2008)
USGS Website (01/17/2022)
Virginia Department of Historical Resources (01/17/2022)
Trace Elements
N=14
| Element |
Min |
Max |
SEM (95%) |
| Na |
150.4 |
278.9 |
217.264 +/- 15.95 |
| Mn |
72.6 |
491.7 |
168.334 +/- 88.18 |
| Zn |
4.69 |
11.17 |
7.518 +/- 1.05 |
| Th |
0.00 |
0.19 |
0.026 +/- 0.26 |
| Sc |
0.3 |
1.1 |
0.585 +/- 0.106 |
| Sb |
0.0 |
0.4 |
0.171 +/- 0.597 |
| Fe |
14441 |
24548 |
19227+/- 1853.47 |
| Eu |
0.041 |
0.197 |
0.132 +/- 22.76 |
| Cr |
0.193 |
1.629 |
0.805 +/- 34.66 |
| Co |
0.462 |
2.444 |
0.959 +/- 0.342 |
| Ce |
0.435 |
2.436 |
1.486 +/- 0.362 |
| Yb |
0.133 |
0.741 |
0.467 +/- 0.109 |
| Sm |
0.143 |
0.668 |
0.416 +/- 0.090 |
| La |
0.248 |
2.171 |
0.890 +/- 0.288 |
| Ba |
0.0 |
29.8 |
14.979 +/- 6.729 |
| As |
8.81 |
34.56 |
21.538 +/- 4.021 |
(Stevenson et al., 2008)
Archeological Details:
Material Type:
Cultural Period used: This material was used from the
Paleo to the Early Archaic period.
Primary use:
Geological Formation Details:
Brook Run Jasper is associated with volcanic
intrusions into the red siltstone and sandstone (possible of the Newark
Group) in the Culpepper Basin.
