科罗拉多大峡谷是怎么被“切”出来的？
How was the Grand Canyon “carved” out?
科罗拉多河在几百万年里不断向下冲刷、加上风雨剥蚀，把高原一层层切深，形成了今天十几公里宽、上千米深的大峡谷。
Over millions of years the Colorado River cut downward while weather eroded the sides, slicing the plateau into a canyon over ten km wide and more than a km deep.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#大峡谷 #侵蚀
为什么有的山圆（如火山穹丘），有的尖（如角峰）？
Why are some mountains round (like lava domes) and others sharp (like horns)?
火山穹丘由黏稠熔岩慢慢堆成，坡面圆缓；角峰是冰川从四面把山体啃成尖角，所以形状截然不同。
A lava dome is built by slow, sticky lava, giving gentle rounded slopes; an arête/horn is carved sharp by glaciers on several sides, so shapes differ sharply.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#火山穹丘 #角峰
火山喷发后为什么会形成黑曜石这种“天然玻璃”？
Why does volcanic eruption produce obsidian, a natural glass?
富含二氧化硅的熔岩若遇水急速冷却，原子来不及排列成晶体，就凝固成黑亮、贝壳状断裂的玻璃质岩石——黑曜石。
Silica-rich lava that cools extremely fast in water leaves atoms no time to form crystals, so it solidifies as a black, glassy rock with shell-like fractures: obsidian.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#黑曜石 #火山玻璃
雅鲁藏布大峡谷为什么那么深？
Why is the Yarlung Tsangpo Grand Canyon so deep?
印度板块撞上欧亚板块使地壳快速抬升，而雅鲁藏布江又强烈下切，抬升和侵蚀“赛跑”，切出了世界上最深的大峡谷。
The Indian plate colliding with Eurasia lifted the crust rapidly, while the river cut down just as fast; this uplift-erosion race carved the world's deepest canyon.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#雅鲁藏布 #大峡谷
冰岛为什么被称为“冰与火之国”？
Why is Iceland called the “land of fire and ice”?
冰岛正好压在大西洋中脊和地幔热点上，火山和温泉很多；同时高纬度又有大面积冰川，冰与火同时存在。
Iceland sits on the Mid-Atlantic Ridge and a mantle hotspot, so it has many volcanoes and hot springs, yet its high latitude also bears huge glaciers—fire and ice together.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#冰岛 #火山冰川
什么是“丹霞地貌”，红色的崖壁是怎么来的？
What is “Danxia landform” and why are the cliffs red?
丹霞是红色砂砾岩经风化、流水切割形成的赤壁丹崖。岩石里的铁被氧化成红色，看起来像火烧的一样。
Danxia forms when red sandstone and conglomerate are cut by weathering and rivers. Iron in the rock oxidizes red, leaving glowing cliff walls.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#丹霞 #红层
什么是“桌山”，山顶为什么那么平？
What is a “table mountain” and why is its top so flat?
桌山是顶部盖着一层坚硬水平岩石、下方软岩被侵蚀掉后留下的平顶山，像一张桌子。南非的开普敦桌山最著名。
A table mountain keeps a flat top because a hard horizontal rock layer resists erosion while softer rock below is worn away—like a tabletop. Cape Town's is the famous one.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#桌山 #平顶
密西西比河三角洲为什么像“鸟爪”？
Why does the Mississippi Delta look like a bird's foot?
河流分多条岔道（汊流）把泥沙送到海里，每条岔道像一根脚趾，泥沙堆积成鸟足状的三角洲。
The river splits into several distributary channels that carry sediment to the sea; each builds a toe of land, together forming a bird-foot-shaped delta.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#三角洲 #鸟足
为什么桂林山水多奇峰（喀斯特地貌）？
Why does Guilin have so many fantastical peaks (karst)?
这里大多是石灰岩，雨水带二氧化碳变成弱酸，把岩石溶出裂缝和洞穴，剩下一根根孤立的石峰和清澈的漓江。
The area is mostly limestone; rain mixed with CO₂ becomes weak acid that dissolves the rock into cracks and caves, leaving isolated towers and the clear Li River.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
Tarbuck & Lutgens,《Earth Science》第14版,Pearson,2015
E. J. Tarbuck and F. K. Lutgens, Earth Science, 14th ed., Pearson, 2015
#喀斯特 #石峰