Table 1
Overview of carbonaceous chondrites classes.
| Class | Example | Falls | Notes |
|---|---|---|---|
| * CI1 | Ivuna (TZ) | 0.4% | No chondrules, no CAIs, abundant water, IDP-like, solar-like |
| CY1 | Yamato (An) | ? | Aqueous + thermal alteration, King et al. (2019) |
| * CM1-2 | Mighei (UA) | 1.8% | 0.3-mm chondrules, 20% of chondrules ↔ 80% of matrix |
| CR1-3 | Renazzo (IT) | 0.2% | 0.7-mm, 55% ↔ 45% |
| CH2-3 | high-metal | 0.05%? | 0.02-mm, 70% ↔ 30%, high-metal |
| * CO3 | Ornans (FR) | 0.5% | 0.15-mm, 50% ↔ 50% |
| * CV3 | Vigarano (IT) | 0.6% | 1-mm, 45% ↔ 55% |
| CK3-6 | Karoonda (AU) | 0.2% | 1-mm, 45% ↔ 55% |
| CB3 | Bencubin (AU) | 0.05%? | up to 10-mm, 30% ↔ 70%, high-metal |
| CL4 | Loongana (AU) | ? | 1-mm, 80% ↔ 20%, Metzler et al. (2021) |
| C-ungr. | Tagish Lake (CA) | 0.5% | Distinct, e.g. fragile, low density, . . . |
| Σ4.9% | |||
Notes. A typical range of petrologic types (1–6) is shown, corresponding to aqueous alteration: 1 ← 3 (CI ← CH); or thermal alteration: 4 → 6 (CO → CL). Adapted from Cobb & Pudritz (2014). The percentages of falls (out of 36 falls) are from https://www.lpi.usra.edu/meteor/ (Gattacceca et al. 2022). The mean bulk densities are: CI 1.6, CM 2.3, CO 3.0, CV 3.1 g cm−3 (Consolmagno et al. 2008; Macke et al. 2011).
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