Digital Tutorial for Sandstone Petrography

在一个为期一年的概念验证项目中，开发并测试了砂岩岩石学交互式数字教程的演示版本。当前教程是砂岩成分的岩相学图像的集合，其中映射区域响应主动查询（通过鼠标点击）以揭示识别和概念信息。围绕民间砂岩分类组织，图像收集解决了物源和成岩作用，并作为补充，甚至部分取代，传统的实验室练习。在奥斯汀的得克萨斯大学，在两个学期的GEO 416M，沉积岩的教程进行了正式的教育评估。本科沉积岩石学学生的态度和成就，谁没有利用示范版本作为一个必要的资源，在他们的实验室练习表明，学生的反应非常好，这种风格的学习。评估结果支持了教育方法的合理性，也为未来的发展指明了一些明确的方向。这个完整的开发项目将图像集的大小增加一倍，超过600张图像和相关文本，并根据学生对演示版本的体验添加大量新元素。德克萨斯大学和其他四所大学正在继续开展评估活动。数字砂岩教程对主要砂岩成分和主要砂岩类型（以及页岩示例）的主要岩相学特征进行了均衡处理。该教程还包括自我评估和技能模块，帮助学生学习如何识别矿物，估计成分的百分比和纹理。通过非营利组织的出版物，使这一组织良好和强烈注释砂岩图像的大集合随时可供大学和个别学生，包括那些目前没有获得岩石薄片收藏和岩石学专业知识。在这个项目中开发和展示的教育方法可以应用于任何利用视觉数据的自然科学学科。

A demonstration version of an interactive digital tutorial in sandstone petrology was developedand tested during a one-year proof-of-concept project. The current tutorial is a collection of over petrographic images of sandstone components in which mapped regions respond to active inquiry (by mouse clicks) to reveal identification and conceptual information. Organized around the Folk sandstone classification, the image collection addresses both provenance and diagenesis and serves to supplement, and even partially replace, traditional laboratory exercises. Formal educational assessment of the tutorial was undertaken at the University of Texas at Austin during two semesters of GEO 416M, Sedimentary Rocks. The attitudes and attainments of undergraduate sedimentary petrology students who did and did not utilize the demonstration version as a required resource in their laboratory exercises show that students respond extremely well to this style of learning. Assessment results support the soundness of the educationalapproach and also indicate some clear directions for future development. This full development project is doubling the size of the image collection to greater than 600 images and associated text as well as adding substantial new elements in response to student experiences with the demonstration version. Assessment activities are continuing at the University of Texas and at four other universities. The digital sandstone tutorial is providing a well-balanced treatment of the principal petrographic characteristics of major sandstone components and the major sandstone types (and also examples of shales). The tutorial also includes self-assessment and skill modules that help students learn how to identify minerals, estimate the percentage of components, and texture. Publication through a non-profit organization makes this large collection of well-organized and intensely annotated sandstone images readily available to universities and individual students, including those that do not currently have access to petrographic thin section collections and petrographic expertise. The educational approach developed and demonstrated in this project can be applied to any natural science discipline that utilizes visual data.