Collaborative Research: India at the Crossroads--Biotic Change in Continental Vertebrates Across the Cretaceous-Paleogene

合作研究：处于十字路口的印度——白垩纪-古近纪大陆脊椎动物的生物变化

• 批准号: 1736787
• 负责人: Gregory Wilson Mantilla
• 金额: $ 20.02万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1736787&HistoricalAwards=false
• 关键词: Collaborative; Research; India; Crossroads; Biotic

The end of the Cretaceous Period (66 million years ago) is marked by a mass extinction event that led to the demise of many organisms on land and sea, including non-avian dinosaurs, and fostered the diversification of others, such as modern mammals. At the time of this event, the Indian Subcontinent was in the midst of geographic and geological upheaval. As it migrated northward across the equator, it passed over a volcanic hot spot that breached the crust and led to massive outpouring of basalt lava onto the continent forming the Deccan Traps. The effects of these events on India's land biota remain poorly understood due to understudy of India's geological and paleontological record during this time. The goals of this project are to improve understanding of (1) the timing and nature of Deccan volcanism and (2) its biological effects in continental organisms. Improved understanding of the biotic response to major geographic and geologic changes in India will allow comparisons with the record in North America and will inform studies of the interchange of organisms that resulted from India's subsequent collision with Asia.This project brings together expertise in paleontology and Deccan Trap volcanology, geophysics, geochronology, sedimentology and stratigraphy of Trap-associated deposits. Traditional geological and paleontological techniques will be employed, as well as state-of-the-art radioisotopic dating, chemical fingerprinting, and study of magnetism preserved in basalts that are associated with key fossil beds. Research conducted as part of this project will be incorporated into Immersive Virtual Field Trips (iVFTs), which are cyber-learning applications that allow teachers to virtually take students to scientifically significant but inaccessible environments. iVFTs use location-based high-resolution spherical content, 360° panoramic video, giga-pixel imagery, and unique viewpoints via unmanned aerial vehicles (drones) to develop interactive, content-rich, and learner-driven virtual field explorations, experienced online via HTML5.

白垩纪末期（6600万年前）发生了一次大规模灭绝事件，导致陆地和海洋上许多生物的灭绝，包括非鸟类恐龙，并促进了其他生物的多样化，如现代哺乳动物。在这一事件发生时，印度次大陆正处于地理和地质剧变之中。当它向北迁移穿过赤道时，它经过了一个火山热点，这个热点打破了地壳，导致大量玄武岩熔岩涌向大陆，形成了德干圈闭。由于对这一时期印度地质和古生物学记录的研究不足，这些事件对印度陆地生物群的影响仍然知之甚少。该项目的目标是提高对(1)德干火山活动的时间和性质的认识，以及(2)它对大陆生物的生物效应。对印度主要地理和地质变化的生物反应的进一步了解，将有助于与北美的记录进行比较，并将为印度随后与亚洲碰撞导致的生物交换的研究提供信息。该项目汇集了古生物学和德干圈闭火山学、地球物理学、地质年代学、沉积学和圈闭相关矿床地层学方面的专业知识。将采用传统的地质和古生物学技术，以及最先进的放射性同位素定年、化学指纹和研究与关键化石层相关的玄武岩中保存的磁性。作为该项目的一部分进行的研究将纳入沉浸式虚拟实地考察（iVFTs），这是一种网络学习应用程序，允许教师虚拟地将学生带到具有科学意义但无法进入的环境中。iVFTs利用基于位置的高分辨率球形内容、360°全景视频、千兆像素图像和无人机的独特视点，开发交互式、内容丰富、学习者驱动的虚拟野外探索，通过HTML5在线体验。

项目成果

New mammals from the Naskal intertrappean site and the age of India’s earliest eutherians

纳斯卡尔陷阱间遗址的新哺乳动物和印度最早的真兽类的时代

• DOI: 10.1016/j.palaeo.2022.110857
• 发表时间: 2022
• 期刊: Palaeoecology
• 作者: Wilson Mantilla, Gregory P.;Renne, Paul R.;Samant, Bandana;Mohabey, Dhananjay M.;Dhobale, Anup;Tholt, Andrew J.;Tobin, Thomas S.;Widdowson, Mike;Anantharaman, S.;Dassarma, Dilip Chandra
• 通讯作者: Dassarma, Dilip Chandra

First rhynchocephalian (Reptilia, Lepidosauria) from the Cretaceous–Paleogene of India

印度白垩纪古近纪第一个喙头类动物（爬行类、鳞龙类）

• DOI: 10.1080/02724634.2022.2118059
• 发表时间: 2022
• 期刊: Journal of Vertebrate Paleontology
• 影响因子: 1.4
• 作者: Anantharaman, S.;DeMar, David G.;Sivakumar, R.;Dassarma, Dilip Chandra;Wilson Mantilla, Gregory P.;Wilson Mantilla, Jeffrey A.
• 通讯作者: Wilson Mantilla, Jeffrey A.