Source: a technical report commissioned by Ucore, assessing the amount of rare earth elements stored in an Alaskan mountain
I had the geologist explain the lower half of this page to me: it’s a cross section of the mountain under assessment, and the marks along the thick black line (the surface of the mountain) are where the surveyors drilled. The angle of the thin stroke shows the…angle, the length indicates the depth, and those red bars extending horizontally are little bar charts. The length of the red indicates the % concentration of rare earth metals in the sample drilled at that depth, measured by the axis alongside.
I love how this all piles up. Lat, long, depth, angle, rare earth concentration, number of samples taken, it’s all here. My favorite kind of information design: dense, utilitarian, untouched by a designer’s hand.