In geology, a pinnacle, also called a tower, spire, needle, monument, or natural tower, is an individual column of rock standing isolated from other rock, rising as a vertical shaft or spire. It is a natural geomorphological and structural denudation feature, typically tall, slender, and reminiscent of a built tower in outline, and a particularly narrow example of the form is sometimes distinguished as a rock needle.
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Pinnacle (Wikipedia)
In Discipline: Geomorphology, Lead paragraphQuote, In Discipline: Geomorphology, Lead paragraph
A pinnacle is an architectural element originally forming the cap or crown of a buttress or small turret, but afterwards used on parapets at the corners of towers and in many other situations.
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