Marble Bar Meteorite Impact Spherule Bed [61 gm ~ 3.47 Ga]

Discover a Piece of Earth’s Meteorite Impact History from the Archean

Uncover the secrets of the Archean era with this Marble Bar impact spherule ejecta from the Pilbara Craton, Western Australia. This rare geological specimen is a remnant of the late heavy bombardment (LHB), a period marked by intense meteorite and asteroid impacts.

Key Features:

• Silicified Impact Spherules: Contains Fe-rich rims primarily composed of secondary siderite, with high nickel (Ni) abundances and Ni/Cr ratios.
• Historical Significance: Represents hypervelocity impacts that shaped the Pilbara Craton, evidenced by spherule beds with microtektites, microkrystite spherules, iridium anomalies, and nickel-rich minerals.
• Geological Context: Associated with unconformities, banded iron formations, major faulting, erosion, and depositional features.

Specifications:

• Size: 59mm L x 58mm W x 9mm D
• Weight: 61.2 grams
• Age: ~3.47 billion years (Duffer Formation, Marble Bar Chert Member)

• Contents:

  • Impact spherules intermixed with chert fragments and iron-rich spherules with secondary siderite.
  • High nickel abundance in spherule rims.
  • Matrix primarily composed of arenite with spherule lenses within bedded chert.
  • Evidence of fragmentation and tsunami action, with iridium levels at two ppb.

  Included with Purchase:

  • Tag and tag stand
  • Information about the specimen
  • Certificate of Authenticity

  Note: Plexiglass bases and photo cube are not included.

  This Marble Bar impact spherule ejecta is a fascinating addition to any geological collection, offering a tangible connection to our planet’s distant cosmic past.