Nuvvuagittuq Faux Amphibolite Garnet [72 gm ~ 4.3 Ga]

Dynamic Nuvvuagittuq Garnet Paragneiss 72 grams

This specimen contains a mixture of garnet paragneiss and faux amphibolite from the Nuvvuagittuq Supracrustal Belt, Canada. It is a premier specimen with terrific form and abundant ancient garnets from the Porpoise Cove locality.

One of Earth's Rarest Geological Locations

The Nuvvuagittuq Supracrustal Belt, an unparalleled rarity in the world of geology, is a treasure trove of geological wonders. Nestled in northern Quebec, Canada, and Hudson Bay, it is believed to be the oldest rock formation on ancient Earth, dating back a staggering ~ 4.3 Ga. This unique belt offers an extremely rare glimpse into the stages of early rock formation on Earth, bridging a geological timeline between the Hadean and early Archean eons.

Specimen Composition and Characteristics

The volcanic-sedimentary origin of this specimen is evident in its composition. Pyrope garnets, abundant in this rock, are a testament to the intense heat and pressure it has endured over millions of years. Paragneiss indicates a sedimentary origin for a metamorphic rock. The metamorphic characteristics give this rock a truly unique and captivating appearance, sure to intrigue any geological enthusiast and make it a top-tier addition to any serious geological collection.

Details about the Nuvvuagittuq Garnets

The garnets in the Nuvvuagittuq Supracrustal Belt are particularly noteworthy. These restite garnets are deep red to reddish-brown and are embedded within the rock matrix. These garnets formed under extreme heat and pressure conditions, typical of the metamorphic processes that shaped this ancient rock. The garnets indicate a high degree of metamorphism, suggesting that the rock has undergone significant transformation since its formation. In some sections of the belt, garnet content can be as high as 50%.

Nuvvuagittuq Unique Rock Features

The traditional 'faux amphibolites' are rich in cummingtonite amphibolite composition. Unlike most amphibolites with dark green hues, this unique Belt showcases sections with a fascinating grayish-beige color, earning it the nickname 'faux-amphibolite' due to its resemblance to true amphibolite. Abundant in garnets, this specimen indicates a volcanic-sedimentary origin with highly metamorphosed characteristics.

Sm-Nd anomalous values from this locality show that some protoliths in the Nuvvuagittuq Supracrustal Belt may be greater than 4.3 billion years. Interpretation of data, as in the majority of scientific disciplines, continues to be debated.

What does "faux amphibolite" mean? Researchers coined the term “ faux amphibolite” due to the rocks’ unique composition, which is predominantly cummingtonite, an uncommon type of amphibolite.

Specimen Information

• Size of specimen: 78mm L x 72mm W x 7mm D
• Weight: 72 grams
• Ships with: Certificate of Authenticity, detailed information, tag, tag stand and XRF.  
• Legality: Professionally and legally collected in early 2000s.

Great Geology Collection Specimen

The captivating appearance of this rock will undoubtedly allow it to be a stand-alone showpiece. Its rich history and unique characteristics make it a conversation starter and a true testament to the wonders of our planet.

 

This scientific material is Guaranteed Authentic. It was professionally and legally collected and arrives with a Certificate of Authenticity, information, tag, tag stand, and XRF.