摇滚乐(Rock 'n' bowl)

欢迎来到大自然的保龄球馆。美国加利福尼亚州门多西诺海岸的保龄球海滩因其遍布海岸的引人注目的岩层而得名。这些砂岩球——一种被称为结核的现象——是在数百万年的时间里形成的，沉积层围绕着由矿物胶结物固定在一起的沙子和石头的中心核心堆积而成。侵蚀逐渐磨损了外层，暴露出我们今天看到的球形。这创造了一个只有在退潮时才会出现的迷人奇观。混凝土很罕见，人们对它们的来源有很多疯狂的猜测，有些人认为它们是外星碎片，而另一些人则怀疑它们是否是恐龙化石。然而，答案很简单：这是大自然的力量在起作用。
原文：
Welcome to nature's bowling alley. Bowling Ball Beach on the Mendocino Coast in California, United States, is named after the striking rock formations strewn across the shore. These sandstone balls—a phenomenon known as concretions—formed over millions of years as sedimentary layers built up around a central core of sand and stone held together by mineral cements. Erosion gradually wore away the outer layers to expose the spherical shapes we see today. This created a fascinating spectacle that only appears at low tide. Concretions are rare and there has been plenty of wild speculation about where they come from, with some believing them to be extraterrestrial debris while others wondering if they are dinosaur fossils. The answer, however, is quite simple: it is the forces of nature at play.
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