Geological maps of Earth typically incorporate field observations of rock lithology, structure, composition, and more. In contrast, conventional planetary geological maps are often made using primarily qualitative morphostratigraphic remote sensing observations of planetary surfaces. However, it is possible to define independent quantitative spectral units (SUs) of planetary surfaces, which potentially contain information about surface composition, grain size, and space weathering exposure. Here, we demonstrate a generic method to combine independently derived geomorphic and SUs, using the Rachmaninoff basin, Mercury, as an example to create a new geostratigraphic map. From this geostratigraphic map, we can infer some compositional differences within geomorphic units, which clarifies and elaborates on the geological evolution of the region.

中文翻译：

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拉赫玛尼诺夫盆地地区的地理地层图：整合水星上的形态地层和光谱单位

地球地质图通常包含对岩石岩性、结构、成分等的现场观察。相比之下，传统的行星地质图通常主要使用行星表面的定性地貌地层遥感观测来绘制。然而，可以定义行星表面的独立定量光谱单位（SU），其中可能包含有关表面成分、颗粒尺寸和空间风化暴露的信息。在这里，我们演示了一种将独立导出的地貌和 SU 结合起来的通用方法，以水星拉赫玛尼诺夫盆地为例，创建新的地层图。从这张地层图中，我们可以推断出地貌单元内的一些成分差异，从而澄清和阐述了该地区的地质演化。