geologist
词根词缀：
biologist n. 生物学家
bio 生命 + logist …学家 → 生物学家
geologist n. 地质学家
ge 地 + ologist …学家 → 地质学家
philologist n. 语言学家
phil 爱 + ologist …学家 → 爱研究语言的人 → 语言学家
toxicologist n. 毒物学家，毒理学家
toxic 有毒的 + ologist …学家 → 毒物学家，毒理学家
zoologist n. 动物学家
zo 动物 + ologist …学家 → 动物学家
数据来源：新东方英语词汇速记大全
相关例句：
Some of these calendars go back as far as ten million years and are so difficult that you would need an astronomer, astrologer, geologist, and a mathematician just to work out the calculations.
一些历法会回溯到一千万年前，计算非常困难，需要天文家家，占星家，地质学者和数学家去计算。
The geologist theorized brilliantly about the age of the earth.
这地质学家出色地导出有关地球年龄。
Wallace had suggested that Darwin forward the paper to Scottish geologist Charles Lyell.
华莱士建议达尔文将论文转寄给苏格兰地质学家赖尔。
Having read an article describing wegener's idea, the geologist must have been burnt up.
读完描述魏格纳思想的一篇文章的原稿，这位地理学家想必被激怒了。
Although I am not a geologist, I have been collected minerals for years.
虽然我不是一个地质学家，但是我已经收集矿石很多年了。
Oh, the guide answered, before a geologist came here and telled me the fossil had a billion years three years ago, so it should add three.
哦，向导回答道，一个地质学家来过这儿，他告诉我说这些化石有十亿年了，再加上那是整整三年前的事了。