最終更新日：2025/11/28
The field trip guide pointed out an angular unconformity where younger horizontal sandstones rest atop older, tilted shale layers that had been eroded flat.
正解を見る
The field trip guide pointed out an angular unconformity where younger horizontal sandstones rest atop older, tilted shale layers that had been eroded flat.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
