Characterizing the Facies and Stratigraphy of the Enchanted Lake Area in Jezero Crater, Mars
Bibliographic record
Abstract
Abstract Jezero crater contains a sedimentary fan deposit previously interpreted as a delta, which can be studied to better understand the aqueous history of Mars. After a year of traversing and sampling the crater floor, the Mars 2020 Perseverance rover encountered the Enchanted Lake area at the base of the sedimentary fan. Data were collected at Enchanted Lake between sols ∼420–426 and again between sols 556–629 when the rover returned for sampling. The goal of this paper is to describe and characterize the facies within this outcrop to help constrain the paleoenvironment of Enchanted Lake in the context of the overall fan system. Facies are defined based on observed sedimentary structures, bedding geometries, and grain size. The lack of extensive cross‐stratification combined with an abundance of soft sediment deformation, planar bedding, and normal grading leads us to interpret Enchanted Lake as a turbidite succession formed in a generally unconfined prodelta environment. Such depositional environments have high preservation potential for organic matter and potential biosignatures. Samples from these rocks have been collected by Perseverance for a planned Mars Sample Return mission. Our interpretation of Enchanted Lake is also consistent with other sedimentary deposits in the Jezero crater, such as the Kodiak butte, which is interpreted as deltaic in origin. Placing Enchanted Lake in context with Kodiak provides some constraints on the relative timing of these deposits within the Jezero fan system.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".