Eriksson's Dune Earth's Oldest Rhythmites [24.8 g ~3.22 Ga]
Brand : Jensan Scientifics LLC
- SKU:
- JPT-28617
- Condition:
- New
- Availability:
- Usually ships in 24 hours.
- Weight:
- 1.00 LBS
- Minimum Purchase:
- 1 unit
- Maximum Purchase:
- 1 unit
- Shipping:
- Calculated at Checkout
Eriksson's Dune is a 3.2-billion-year-old Archean rhythmite tidal deposit from Barberton, South Africa. It is widely regarded as the oldest known lithified rhythmite tidal deposit on Earth.
This specimen preserves ancient tidal layering, wind-driven surface textures, and sedimentary structures associated with the earliest known interactions on Archean Earth. It is a highly unusual educational collector's piece that speaks directly to early Earth dynamics and deep geologic time.
Eriksson's Dune Geological Significance
This specimen comes from Eriksson's Dune in the Barberton Mountains of South Africa, a locality dated to approximately 3.2 billion years ago (3.2 Ga). It belongs to the Archean Eon and represents an exceptionally early sedimentary record from a planet that was geologically, atmospherically, and astronomically very different from today's Earth.
What makes Eriksson's Dune especially important is its preservation of repeated sedimentary layering interpreted as ancient tidal rhythms (hence the name rhythmites). The interlaminated sandstone, siltstone, and mudstone record cyclic depositional changes influenced by tides, making this material important to discussions of early ocean dynamics and the evolving Earth-Moon system.
During the time this rock formed, Earth rotated faster, days were shorter, and the Moon was significantly closer than it is today. That closer Earth-Moon relationship would have produced stronger tidal effects than those seen in the modern world. As a result, specimens from this locality help support educational discussion about Archean sedimentation, paleotidal processes, and the physical evolution of the early Earth-Moon system.
| Object Type | Archean rhythmite tidal deposits / lithified sedimentary specimen |
| Geological Age | Archean, approximately 3.2 billion years ago (3.2 Ga) |
| Locality | Barberton Mountains, South Africa |
| Dimensions | 56 mm L x 33 mm W x 8 mm D |
| Weight | 24.8 grams |
| Specimen Description | Lightly coated on both sides; top and sides show eolian lithified crust with visible sand deposit layering and lithified sedimentary elements |
| Condition Note | Light surface coating is washable with soap |
| Scientific Significance | Associated with Earth's oldest known lithified tidal deposit and valued for preserved tidal rhythm, sedimentary layering, and evidence of early wind-driven processes |
| What Is Included | Certificate of Authenticity, specimen tag, tag stand, and information sheet |
| Display Note | Plexiglass riser and photo cube are not included |
| Authentication | Professionally and legally collected |
| Shipping | Shipping calculated at checkout |
| U.S. Shipping | Free Priority Shipping within the USA |
Images professionally photographed under controlled studio lighting using Zeiss optics and a pro-grade Canon camera.
What sets this piece apart is the combination of extreme age, preserved tidal rhythm, and visible eolian character in one compact specimen. It offers a rare opportunity to examine a sedimentary record linked to the early Earth-Moon system and the physical forces that shaped Archean shorelines more than 3.2 billion years ago.
Own a genuine piece of Earth's earliest sedimentary history and add one of the oldest known rhythmite tidal deposits to your collection.
Questions Commonly Asked About Eriksson's Dune
What is Eriksson's Dune?
Eriksson's Dune is a lithified Archean sedimentary deposit from South Africa that is widely valued for preserving very early tidal rhythm and wind-influenced sedimentary structures in ancient sand-rich layers.
Why is Eriksson's Dune important?
It is important because it is associated with Earth's oldest known lithified tidal deposit and preserves sedimentary rhythms tied to ancient tidal processes. That makes it highly relevant to early Earth studies, especially those involving Archean environments and paleotidal interpretation.
What are rhythmites?
Rhythmites are layered sedimentary deposits that record repeated cycles of deposition. In settings influenced by tides, those cycles can reflect changes in water movement, sediment supply, and tidal strength over time.
How does this specimen relate to the early Earth-Moon system?
Because the Moon was closer to Earth in the Archean and Earth rotated faster, tidal forces were stronger than they are today. Sedimentary records like Eriksson's Dune are important because they help illustrate how those stronger tidal conditions may have influenced early shoreline and shallow-water deposition.
Who would value this specimen?
This specimen is especially well-suited for collectors of rare geological material, educators, Earth history enthusiasts, and anyone building a collection focused on early Earth, sedimentary processes, or deep-time planetary science.
