ææ©åºç°çæ¯çå½ä¹æºï¼ï¼èç½è´¨ã以åææåç»èçå½ã
ãã5亿年åçéå°ä¸ï¼å°å¤æ¯å
ç§ç§çå±±èå大å°ï¼é¤äºç³å¤´å°±æ¯æ²åï¼æ²¡æä»»ä½çå½ï¼ä¹æ²¡æçå½èµä»¥çåçå壤ãç´å°4亿2å5ç¾ä¸å¹´åï¼æµ·è»æå¨å°ç大æ°ä¸ç§¯ç´¯äºè¶³å¤çæ°§ï¼å½¢æèæ°§å±æ¥ä¿æ¤æ´é²å¨é³å
ä¸ççå½ï¼çç©æå¯è½æµ®åºæ°´é¢ãå°çä¸ææ©ççå½åºç°å¨45亿年åãè¿æ¶ççå½æ¯åç»èä¸æ ·çä¸è¥¿ï¼å®åªæä¸ä¸ªç»èï¼ä»å¤©å°çä¸ææçå¨æ¤ç©é½æ¯ç±ç»èç»æçã
ããå¨ä»¥å漫é¿çå²æä¸ï¼è¿ç§åç»èçå°çå½éå¸æµ·æ´ï¼å¤ç¬å°çæ´»äºå¤§çº¦20亿年ãè¿æ¶çå°çä¸ç©ºæ·ãå¯å¯ï¼ç©ºæ°æ¯ææ¯çï¼æ ¹æ¬æ æ³å¼å¸ã大æ°ä¸æ²¡ææ°§æ°ï¼ä¹æ²¡æä¿æ¤çå½çèæ°§å±ï¼ç´å°å°é¢ç强çç´«å¤çº¿è¾å°åªè¦ä¸ä¸ªå°æ¶å°±å¯ä»¥ææ»ç»å¤§å¤æ°çå½ã大约7亿年åï¼åç»èçç©åæ¼åæå¤ç»èçç©ï¼å°±åä»å¤©çæ¤ç©ä¸æ ·ï¼å®ä»¬é å
åä½ç¨å¸æ¶äºæ°§å碳ï¼æ¾åºæ°§æ°ãè¿ç§åªè½å¨æ¾å¾®éä¸æè½çæ¸
çå°çå½ï¼ç¨äºæ¼«é¿çæ¶é´ï¼è®©å°ç大æ°ä¸å
满äºæ°§æ°ãè¿æ ·ï¼ææ©çå°ççå½å°±ä»ç®åçåç»èçç©è¿åæä¸äºæ´å¤æççå½ãè¿æ¯çå½çé大çªç ´ã
ããæ®æäºä¸å®¶æ¨æµï¼å°è¡£æ¯ææ©ä¸å²¸ççå½ï¼æ£æ¯ç±äºå°è¡£å解岩ç³ï¼åå ä¸èªç¶çåå为åæ¥ç»éççç©æä¸ä¸ç天å°ï¼å 为没æå壤ï¼ä»»ä½å
¶ä»éå°çå½é½æ¯æ æ³çåçãçå½å¨è¿åè¿ç¨ä¸ï¼åä»å继å°ç»è¥åºäºæ们èµä»¥çåçç¯å¢ãçå½ç¬¬ä¸æ¬¡ä»æµ·æ´ç¬ä¸éå°åï¼å°±ä¸æå°å¼åæ°çæ æ¯å°ï¼ç´è³å¸æ»¡å°çä¸çæ¯ä¸ä¸ªè§è½ãå¨åæé¶ä¸23ææ°åº¦ç严å¯å°å±ä¸ï¼æèªå¨çæ´»çè»ç±»åçèï¼å¨æµ·åºç«å±±éè¿è¾¾å°æ²¸ç¹çå¼æ°´ä¸ï¼ä¹æå®è¯¦çæ´»ççå½ãå·²ç¥çæ´»å¨ä¸çæä½å¤çå¨ç©æ¯ä¸ç§åè«åä¸æ ·çæµ·æ´çç©ï¼å¨ç ç©æçå³°æµ·æ6å米以ä¸çå°æ¹ä¹æçå½åå¨ã
ããçå½å¨æå±èªå·±ççå空é´æ¶ï¼ä¸æéåºæ°å é¢çç¯å¢ï¼æåçï¼çä¸äºèªå·±çå代ï¼å¤±è´¥äºçï¼å°±ä»æ¤çç»ãå®ä»¬å°¸éª¨æççå¨å²©ç³éï¼æçæ³æ 踪迹ï¼æ°¸è¿ä¸ä¸ºæ们æç¥ãå¨å°ççå½30å¤äº¿å¹´çè¿åå²ä¸ï¼æ¾ç»çæ´»çæ°ä»¥äº¿è®¡çæ们æªæ¾è§è¿çå¨ç©ãæ¤ç©åå¾®çç©ï¼å®ä»¬é½æ¯çå½ä¸ºåé ä»å¤©çå°ççæç³»ç»æä»åºç代价ãæé¾å¨6åä¸å¹´åçç»ï¼å·¨çæ¯å°çä¸çæ´»è¿çæ大çåºä¹³å¨ç©ï¼å¨7åä¸å°2å4ç¾ä¸å¹´é´çç»ï¼æ¾ç»è¢«æ¬§æ´²äººè¯¯è®¤ä¸ºæ¯äººç±»ç¥å
çå°¼å®å¾·ç¹äººå¨5ä¸å¹´åçç»ãèæ们å½ä»ççå½ï¼åªæ¯ä»ä»¬ä¸é´ç幸åè
ãçå½åå¾å¦æ¤çå¤ç§å¤æ ·ï¼ä¹æ£æ¯å®ä»¬å å亿年æ¥ä¸çæç¯å¢å
±åæ¼åçç»æã
温馨提示:答案为网友推荐,仅供参考