Museum Collection
This specimen is part of the museum collection catalog.
Not for Sale.
Sandstone Concretion var. Zapfensand
Ochsenhausen, Baden-Wurttemburg, Germany
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| Classification |
Sedimentary Rock |
| Tags |
Type Locality
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| Origin Location |
Ochsenhausen, Baden-Wurttemburg, Germany |
| Description |
This eye-catching sample is a sandstone concretion known as a sand spike or Zapfensand from the North Alpine Foreland Basin (NAFB) in Germany. These enigmatic formations were not well understood for centuries, and had been theorized to be created by a variety of possible conditions, as stalactites, through water flow deposition, or even as fossils of ancient turnips! Recent studies have implied that they may be "seismites" - rocks shaped through seismic shaking events, with their orientation providing directional indicators of fault activity. Deposits from California have been shown to have a common orientation in-situ relative to the location of the San Andreas fault.
For more info: https://www.nature.com/articles/s41467-021-27061-6 |
| Luster |
Sandy |
| Luster (Groundmass) |
Not noted, see photo. |
| Optical Phenomena |
Not noted, see photo. |
| Mineral Group / Note |
Not noted, check reference links below. |
| Handling |
No special handling is required. |
| Modifications |
No modifications. |
| Size Group |
Small Cabinet |
| Weight |
Not weighed precisely yet, please inquire. |
| Dimensions |
Not measured precisely yet, please inquire. |
| Quantity |
1 Specimen |
| Mineral List |
* Formula chemical names are auto-generated - may be incorrect on complex formulas.
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Specimen Analysis |
Color Table
Colors found in this specimen image are shown below. Higher number indicates greater concentration of that color.
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Similarly Colored Minerals:
Minerals with similar color profiles are shown below.
How it Works
Quartz Calcite / Marcasite / Dolomite Fluorite  Calcite / Serandite / Aegirine Pyrite Concretion Pumice |
Elements in this Specimen:
Elements that are part of the official chemical structure of the minerals occurring in this specimen are indicated below.
How it Works
Element List:
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Minerals with Similar Chemistry:
Minerals that are similar in terms of their chemical makeup are shown below.
How it Works
This Mineral Formula Similar Mineral Formula
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Mineral Group:
Search the catalog for minerals that share the same group as this specimen:
How it Works
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| Tools |
Edit Specimen
Search Wikipedia: Sandstone Concretion (Wiki)
Search Mindat: Sandstone Concretion
Search Web Mineral DB: Sandstone Concretion
Search for Handbook of Mineralogy: Sandstone Concretion
Search Wikipedia: Zapfensand (Wiki)
Search Mindat: Zapfensand
Search Web Mineral DB: Zapfensand
Search for Handbook of Mineralogy: Zapfensand
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