NWA XXX Unclassified Ordinary Chondrite Individual, 1668.24g, Oriented Flight with Fresh Fusion Crust

Oriented atmospheric entry preserved in stone

This 1668.24-gram ordinary chondrite individual displays textbook evidence of stable atmospheric flight. The specimen retains complete fusion crust coverage -- a glossy black shell that formed as the meteorite's leading surface melted during hypersonic entry. The oriented shape and asymmetric ablation pattern indicate the stone maintained a consistent orientation as it decelerated through Earth's atmosphere, a relatively uncommon preservation state that makes this specimen scientifically and visually distinctive.

Regmaglypts cover the fusion-crusted surface in overlapping patterns. These thumbprint-like depressions formed as turbulent air currents sculpted the molten surface layer during descent. The depth and clarity of these features reflect the intensity of atmospheric heating and the stone's composition. Fresh fusion crust like this degrades quickly once a meteorite reaches the ground, making the preservation state of this 2024 find particularly notable.

Surface features and ablation characteristics

The fusion crust shows no weathering, oxidation, or terrestrial contamination. Its uniform black coloration and glassy texture indicate minimal time between fall and recovery. The oriented shape is evident in the specimen's asymmetric profile -- one face shows pronounced frontal ablation, while the trailing surfaces preserve less intense heating effects. This differential ablation creates the classic cone or shield shape associated with oriented meteorites.

Regmaglypt distribution follows the airflow patterns that developed during atmospheric passage. Deeper impressions appear on the leading surface where heating was most intense, while shallower features mark the transition zones. The fusion crust thickness varies across the specimen, another indicator of oriented flight. No breakage, fragmentation, or impact damage is present, suggesting the stone survived atmospheric entry and ground impact intact.

Scientific context

Ordinary chondrites represent the most common meteorite type recovered on Earth, accounting for roughly 80% of all documented falls and finds. These stones formed in the early solar system from dust and small particles that accreted into larger parent bodies. The presence of chondrules -- millimeter-scale spherical structures visible in cross-section -- defines this meteorite class and provides direct samples of the solar nebula's earliest solid materials.

This specimen awaits formal classification, which will determine its specific subgroup (H, L, or LL) based on iron content and olivine composition. The unclassified status offers research value for institutions or collectors interested in contributing petrographic and chemical data to the Meteoritical Bulletin. Learn About Meteorites to understand the classification process and what distinguishes chondrite subgroups.

Frequently asked questions

Is this meteorite authenticated? This specimen is confirmed as a meteorite based on fusion crust, regmaglypt morphology, and material characteristics consistent with ordinary chondrites. Formal classification is pending submission to the Meteoritical Society. A certificate of authenticity documenting provenance, recovery location, and physical characteristics is included with purchase.

What does "oriented" mean for a meteorite? Oriented flight occurs when a meteorite maintains a stable orientation during atmospheric entry rather than tumbling. This creates asymmetric ablation patterns, with more intense melting on the leading face. The resulting shape and regmaglypt distribution provide evidence of the stone's flight dynamics and heating history.

What are regmaglypts and how do they form? Regmaglypts are thumbprint-like depressions that form when turbulent air currents scour the molten fusion crust during atmospheric passage. Their depth, distribution, and morphology depend on entry velocity, composition, and flight orientation. Well-developed regmaglypts like those on this specimen indicate intense atmospheric interaction and are highly valued by collectors.

What is included with this specimen? This listing includes the 1668.24-gram oriented chondrite individual and a certificate of authenticity. No display stand is included.

Why is this specimen unclassified? Classification requires thin-section petrographic analysis and elemental composition measurements submitted to the Meteoritical Society's Nomenclature Committee. Many Northwest Africa finds await formal classification due to the volume of material recovered and limited laboratory capacity. The meteorite's identity as an ordinary chondrite is confirmed by its physical and structural characteristics.

Display and collector significance

Oriented meteorites with intact fusion crust represent a small fraction of recovered specimens. Most stones tumble during atmospheric entry, creating uniform fusion crust coverage without directional ablation features. This specimen's size, preservation state, and clear flight orientation make it suitable for educational displays, institutional collections, or private collections focused on atmospheric entry phenomena.

The 1668.24-gram mass provides substantial physical presence without requiring specialized display infrastructure. The complete fusion crust coverage and regmaglypt development are visible from multiple angles, making this an effective teaching specimen for explaining atmospheric entry processes. Fresh fusion crust degrades over time through terrestrial weathering, making recent finds like this 2024 recovery particularly desirable for collectors prioritizing surface preservation. Explore our full Chondrites collection to compare preservation states and morphological diversity across different finds.