“金钉子”知多少（趣科普·你问我答）

Core Points - The "Golden Spike" is not made of gold but consists of materials like iron, copper, and organic glass, named after a golden spike used during the completion of the transcontinental railroad in North America [2] - The process of establishing a "Golden Spike" involves selecting a suitable geological profile, voting by an international working group, and multiple rounds of discussions and approvals before formal recognition [3] - The installation of a "Golden Spike" can be done by hammering it directly into the boundary point or using strong adhesive, and it typically contains information such as the name of the International Stratigraphic Committee, the name of the "Golden Spike," the boundary location, and the year of establishment [4]