Mallory was perhaps rather boring, but he was very well-qualified and stored lots of useless and useful information. He knew that bays form when weak (less resistant) rocks (such as sands and clays) are eroded, leaving bands of stronger (more resistant) rocks (such as chalk, limestone, granite) forming a headland, or peninsula, and that through the deposition of sediment within the bay and the erosion of the headlands, coastlines eventually straighten out then start the same process all over again, and he would tell people about all of that knowledge and data while recommending what kind of hat to wear when heading out.

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