Idiwhaa Tonalitic Acasta Gneiss- Meteorite Impact Melt 100g (4 Billion Years Old)

Idiwhaa Tonalitic Acasta Gneiss

Own a piece of the literal foundation of our planet. The Idiwhaa Tonalitic Acasta Gneiss is a geological messenger from the Hadean Eon, the first and oldest geological eon, which spanned from Earth's formation about 4.6 billion years ago to roughly 4.0 billion years ago. Characterised by a molten surface, intense volcanic activity, and constant asteroid bombardment, this era saw the creation of the Moon, the solidification of the Earth's crust, and the formation of the first oceans.

Found along the banks of the Acasta River in the remote Northwest Territories of Canada, this specimen represents the oldest known intact crustal rock on Earth, dating back 4.02 billion years.

The "Impact Melt" Origin

For decades, geologists struggled to explain how such a silica-rich (tonalitic) rock could form so early in Earth’s history, long before modern plate tectonics were active. Recent ground-breaking research suggests a cosmic origin: The Impact Melt Theory.

Scientific analysis indicates that the Idiwhaa Gneiss was formed at a time when massive meteorite impacts slammed into the basaltic crust of the young Earth. The sheer kinetic energy of these rocks generated localised, extreme heat at shallow depths, melting the existing rock and allowing it to reform into the tonalitic gneiss we see today. This specimen is a physical record of the "Late Heavy Bombardment," a period when our planet was under constant siege from interplanetary objects.

Geological Background & Composition

The term "Idiwhaa" is derived from the Tlicho (Dene) word for "ancient," a name bestowed upon this specific 4.02-billion-year-old unit by the indigenous people of the region and the geologists who mapped it.

Classification: It is a Tonalitic Gneiss, a high-grade metamorphic rock characterized by its banded appearance.

This specimen offers a chance to hold the very beginning of time in your own hands. It predates the existence of multi-cellular life, the formation of the modern continents, and even the oxygenation of our atmosphere. It is the ultimate cornerstone for any serious geological collection, offering a direct link to the Earths formation.

Important Note: Due to the extreme remoteness of the Acasta River and the scientific importance of the site, authentic samples are difficult to obtain. This specimen comes with a certificate of authenticity, and represents an exceptionally rare opportunity to own a piece of Earth's earliest history.

Weight: 100 grams

Dimensions: 14cm x 5cm x 1cm

Includes: Certificate of authenticity