Undergraduates Discovering Folds in “Flat” Strata: An Unusual Undergraduate Geology Field Methods Course
Undergraduates Discovering Folds in “Flat” Strata: An Unusual Undergraduate Geology Field Methods Course
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本科生发现“平坦”地层中的褶皱：一门不寻常的本科地质学现场方法课程
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Abolins
中科院分区：
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作者：
M. Abolins
摘要本科生在一个学期的地质野外方法课程中学会了在地层倾角小于9°的野外测量、绘制和解释层面产状。尽管地层倾角较低，2011年野外课程的学生还是发现了一个半公里宽的构造盆地，他们使用数字水准仪和布伦顿袖珍经纬仪测量了沿着河岸绿道众多露头的层面姿态。学生在所有五个结构域中再现了教师倾斜方向，在五个结构域中的四个中再现了平均层面姿态（p < 0.05）。在完成野外地图的21名学生中，只有6人在测量和绘制姿态或绘制和标记地质接触方面遇到困难。按5分制计算，学生平均评估分数为4.1，所有七个评估类别的平均值均在部门平均值的一个标准差范围内。然而，相对于2011年秋季教授的其他五门初级和高级地质学课程，该课程的评价较差，因为这些课程的平均评价分数从4.2到4.9不等。结果表明，学生可以学习测量，绘图，并解释层面的态度在野外地区，地层倾角小于10°。
ABSTRACT Undergraduates learned to measure, map, and interpret bedding plane attitudes during a semesterlong geology field methods course in a field area where strata dip less than 9°. Despite the low dip of the strata, 2011 field course students discovered a half-kilometer-wide structural basin by using digital levels and Brunton pocket transits to measure bedding plane attitudes at numerous outcrops along a riparian greenway. Students reproduced faculty dip directions in all five structural domains and mean bedding plane attitudes in four of five structural domains (p < 0.05). Of 21 students who completed a field map, only 6 had trouble either measuring and plotting attitudes or drawing and labeling geologic contacts. The mean student evaluation score was 4.1 on a 5-point scale, and all seven evaluation category means were well within one standard deviation of departmental means. However, the course evaluated poorly relative to the other five junior- and senior-level geology courses taught during fall 2011 because mean evaluation scores for those courses ranged from 4.2 to 4.9. Results show that students can learn to measure, map, and interpret bedding plane attitudes in a field area where strata dip less than 10°.