Lakes surrounded by which type of rock have low acid-neutralizing capacity?

Lakes that are surrounded by granite typically exhibit low acid-neutralizing capacity because granite is composed primarily of quartz, feldspar, and mica, which do not contribute significant buffering minerals that can neutralize acids. The mineral composition of granite lacks the calcium carbonate found in sedimentary rocks like limestone, which plays a crucial role in increasing the water's capacity to neutralize acidity.

In contrast, limestone contains considerable amounts of calcium carbonate that can react with acids to form carbon dioxide and water, thereby mitigating acidification. Basalt, which is rich in magnesium and iron, can also provide some buffering capacity, but it is not as effective as limestone. Shale, primarily a clay-rich rock, generally has minimal buffering capabilities like granite.

Due to these characteristics, those lakes with granite surrounding them are more vulnerable to changes in pH and are less able to neutralize added acids from pollutants or natural processes, leading to low acid-neutralizing capacity.