最終更新日:2025/11/28
The coastal outcrop revealed layers of boundstone interbedded with shales, indicating reefal activity during the Silurian.
正解を見る
The coastal outcrop revealed layers of boundstone interbedded with shales, indicating reefal activity during the Silurian.
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)