近日，廣東一條採砂船在北江河道採砂時意外發現河底有古樹群，當時撈上來的還有整棵樹，引來很多好奇的村民圍觀。
據專家稱，古樹經長年河水浸泡和沙石磨壓，木質結構發生變化，可能會形成「化石木」，因具備耐腐蝕，不怕蟲害，蒼勁古朴，歷來是藝術雕刻和室內裝飾的名貴用材，價格十分昂貴，堪稱「黃金木」，如證實北江下藏有古樹群，應制定環保措施妥善保護利用，也可為研究北江地質氣候及植被演變提供珍貴的實物標本。
廣州日報6月9日報道 巨大的樹干滿布貝殼化石，「潛水」北江已不知多少年……昨天，記者在清遠山塘鎮碼頭見到堆放在岸邊的十幾棵神奇古樹木，它們都是連日來被巨型挖砂船從北江河裡打撈上來的。
挖砂挖出古樹群
這些深藏在北江河底的古樹胸徑最粗的有數米多，得好幾人才能合抱，樹干最長的則有十幾米。由於久經河水浸泡，滿布貝殼，全身烏黑，堅硬如鐵，記者扒開一小塊碎木屑，還能聞到淡淡的香味。
據當地村民介紹，這些天，一條采砂船在北江河道采砂時意外發現河底有古樹群，當時撈上來的還有整棵樹，引來很多好奇的村民圍觀。
一位村民說，這幾棵古樹要長到這等身段，得歷經數百上千年，而自古以來北江從這蜿蜒而過，這些樹木又是在什麼年月、怎麼會沉入江底呢?有無科研價值?還真是一個費解的謎。
記者咨詢過當地林業工作人員，據悉，根據現場勘查，樹木變成黑色的原因是炭化，埋藏的深度至少有幾米，數量之多，樹齡如此之老的古樹木群不可能是從上游漂下來的。
這些古樹木有可能是很久以前地質結構變化，比如地震或山體滑坡時整片森林沉入江中形成。目前，需要聯系相關科研機構鑑定之後，才能確定古樹的種類和採取保護措施。
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