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4 months ago
PLoS期刊
0:08
古生物學家近日在期刊《PLOS One》刊登最新發現,在玻利維亞安地斯山脈的Carreras Pampas遺址發現高達16,000個獸腳類恐龍足跡,為目前全球已知數量最多的同類足跡絕錄,堪稱「恐龍高速公路」。 據報,這些足跡屬生活於6,600萬至1億年前的白堊紀晚期的三趾、雙足行走的獸腳類恐龍,包括與暴龍 Trex同屬的肉食性種類。腳印被保存於古代湖岸泥層,顯示牠們除行走、奔跑,還包括超過1300個「游泳痕跡」。 研究團隊表示牠們曾在泥濘的湖底沉積物中用爪子划動,隨後水位上升封存了這些痕跡,使其免受數百萬年的侵蝕。 古生物學家Richard Butler讚譽此次發現是「了解白堊紀末期恐龍生活的珍貴窗口」。雖然被發現的足跡數量眾多,但該區幾乎未發現恐龍骨骼、牙齒或蛋化石。 研究人員推測,該片高原曾連接南秘魯、玻利維亞與阿根廷北部的恐龍遷徙走廊,恐龍短暫穿越、飲水、覓食所留下的印記並未有長期定居。 儘管這些遺跡存留了數千萬年,但亦曾因公路工程催毁主要遺跡。目前國家公園已介入保護,科學家預期在現有挖掘區域的邊緣,還將發現更多未出土的足跡。 (新聞來源:AP News) | 香港討論區
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香港討論區
38.1K views
2 months ago
0:39
公視新聞網 on Instagram: "🦕玻利維亞藏著恐龍樂園? 玻利維亞(Bolivia)中部的托羅托羅國家公園(Torotoro National Park),竟然藏著世界最多的恐龍足跡? 根據美聯社報導,一支由加州洛馬琳達大學古生物學家組成的團隊,日前在期刊《PLOS One》發表研究報告,指出在國家公園的卡雷拉斯潘帕斯足跡遺址(Carreras Pampas tracks),發現16600個白堊紀(約6000多萬年前)獸腳類恐龍足跡。這是目前為止全球記錄到的,獸腳類恐龍足跡數量最多的一次,足跡大小深淺各異,顯示當時恐龍族群豐富。 此外也發現當時恐龍曾試圖在此地進行游泳,在湖底沉積物上留下1378個肢體運動產生的刮痕,學者指出,恐龍是在水位上升前將爪子深壓入泥中,這讓足跡得以在後續的地質作用下保存完好、免於侵蝕。 研究者之一西班牙古生物學家勞爾·埃斯佩蘭特(Raúl Esperante)表示,「世界上沒有哪個地方像這裡一樣,擁有如此豐富的獸腳類恐龍足跡。」 研究報告稱,恐龍足跡得以妥善保存有幾個因素:所有足跡都在同一塊裸露地層上、該地底質與沉積或硬化條件各異,使深淺不一的足跡
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pts.news
1.8K views
2 months ago
0:07
香港討論區 Discuss on Instagram: "古生物學家近日在期刊《PLOS One》刊登最新發現,在玻利維亞安地斯山脈的Carreras Pampas遺址發現高達16,000個獸腳類恐龍足跡,為目前全球已知數量最多的同類足跡絕錄,堪稱「恐龍高速公路」。 據報,這些足跡屬生活於6,600萬至1億年前的白堊紀晚期的三趾、雙足行走的獸腳類恐龍,包括與暴龍 Trex同屬的肉食性種類。腳印被保存於古代湖岸泥層,顯示牠們除行走、奔跑,還包括超過1300個「游泳痕跡」。 研究團隊表示牠們曾在泥濘的湖底沉積物中用爪子划動,隨後水位上升封存了這些痕跡,使其免受數百萬年的侵蝕。 古生物學家Richard Butler讚譽此次發現是「了解白堊紀末期恐龍生活的珍貴窗口」。雖然被發現的足跡數量眾多,但該區幾乎未發現恐龍骨骼、牙齒或蛋化石。 研究人員推測,該片高原曾連接南秘魯、玻利維亞與阿根廷北部的恐龍遷徙走廊,恐龍短暫穿越、飲水、覓食所留下的印記並未有長期定居。 儘管這些遺跡存留了數千萬年,但亦曾因公路工程催毁主要遺跡。目前國家公園已介入保護,科學家預期在現有挖掘區域的邊緣,還將發現更多未出土的足
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