Eriksson's Dune Oldest Lithified Sand Dune [52087]

Eriksson’s Oldest Dune from Barberton South Africa

Eriksson’s Dune, the oldest lithified dune in the world, is exclusively found in South Africa. Dating back 3.2 billion years (Ga), this remarkable geological formation was named after K.A. Eriksson, a South African geologist who documented it in 1978. This ancient dune shows evidence of tidal activity, indicating that the ocean had rhythmic movements even in those early times. The rocks are composed of small sandstone chunks and other sediments like siltstone and mudstone, making Eriksson’s Dune a unique geological find.

Earth-Moon System: A Dynamic Dance

During the formation of Eriksson’s Dune, the young Moon had a synodic month of about 26.2 lunar days, and Earth’s day lasted approximately 13 hours. This close Earth-Moon system resulted in more powerful ocean tides than we experience today. The preserved tidal layers in Eriksson’s Dune, up to 15 different layers, reflect the varying strengths of the young Earth's tides, offering a unique window into the dynamics of the early Moon-Earth system.

Geological Composition

Eriksson’s Dune is composed of small sandstone chunks, siltstone, and mudstone. The alternating layers of these sediments reveal the ancient tidal cycles, providing valuable insights into the early Earth’s geological processes.

Specimen Details

Size: 76mm L x 72mm W x 9mm D
Weight: 67.7 grams
This specimen is un-polished and lightly sprayed with water. The crust that encircles the top, sides, and bottom are its weathered natural features. Note: All-natural transverse sedimentary lines run left to right, mirroring on both sides.

Shipping and Additional Information

This specimen ships with a Certificate of Authenticity, information about the specimen, a tag, and a tag stand. Please note that the acrylic stand and photo cube are not included. Eriksson’s Dune PHOTO in situ and copies of relevant scientific articles are included. You can have one or both sides polished for an additional cost, using up to 3,000 grit, cerium oxide, or super polish. Inquire if interested (allow 2 extra days for shipping, cost $350).

Legal Collection

This Eriksson’s Dune specimen was legally obtained in a trade with a scientific institution.

Terrific Specimen for Important Geological Collections

Add Eriksson’s Dune from the world’s most ancient beach to your diverse geological collection today. Learn and teach about geology on a whole new level by including the dynamics of the early Earth-Moon system with this beautiful geological specimen.

This scientific material is Guaranteed Authentic. It was professionally and legally collected and arrives with a Certificate of Authenticity.