My thesis work led to three long glorious summers in arctic Norway and Sweden where I studied the Cambro-Ordovician collision between ancient North America and Europe.

• 为完成博士论文,我在严寒的挪威和瑞典度过了三个漫长而又宜人的夏天,期间我对古北美州和欧洲大陆间的Cambro-Ordovician碰撞进行了研究。