Copyright:
原文:
What caused these Martian rocks to be layered? The leading hypothesis is an ancient Martian lake that kept evaporating and refilling over 10 million years — but has now remained dry and empty of water for billions of years. The featured image, taken last November by the robotic Curiosity rover, shows one-meter wide Whale Rock which is part of the Pahrump Hills outcrop at the base of Mount Sharp. Also evident in the image is cross-bedding — rock with angled layers — which were likely facilitated by waves of sand. Curiosity continues to find many layered rocks like this as it continues to roll around and up 5.5-km high Mount Sharp.
中文翻譯:
在這幅圖片中，我們能看到這些火星岩石的分層結構。主要的假設是，這些分層的形成與一個古老的火星湖泊有關，這個湖泊不斷地蒸發及重新補充，持續了約 1000 萬年之久，但在數十億年前便已經乾涸，並缺乏水源。這幅圖片是由機器人探測車 Curiosity於去年十一月拍攝的，顯示了一米寬的 Whale Rock ，這是 Mount Sharp 基部的 Pahrump Hills 露頭的一部分。圖片中還可以看到交錯層理（cross-bedding），這些岩石的傾斜層理可能是由沙浪所促成的。Curiosity 仍然在 Mount Sharp 高達 5.5 公里的區域中發現許多類似的分層岩石。
#火星探索 #Curiosity探測車 #古湖泊 #PahrumpHills #WhaleRock #交錯層理 #火星地質 #宇宙奧秘 #火星科學 #MountSharp #太空探險
來源:NASA每日圖片
