Evidence item

The quoted passage directly states that lower Margin-unit exposures reveal a complex history of water-rock interaction, in contrast to the high-elevation exposures without significant water exposure. DIRECT_TEXT

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 24642

Source: Lake- and groundwater-associated alteration of the olivine-rich Margin unit in Jezero crater, Mars · locator {} · excerpt hash sha256:131c071cbbb4b287710ef75b40b55a97f5faeb0b86f7edb06bf10558adb6717d

Exact excerpt

Using SuperCam data, we evaluate the origin and alteration history of this enigmatic unit. Here, we show that the Margin unit explored at high elevations (>−2350 m) has a texture and chemistry indicative of a slow-cooled, crystalline, olivine-rich rock without significant water exposure. In contrast, exposures situated below the hypothesized Jezero paleolake’s second terrace level reveal a complex history of water-rock interaction.

Linked claims

Claim	Direction	Relevance	Steps	Counted
01b62310	SUPPORT	DIRECT	0	yes

Audits

None.