Allerø d
/ˈælərɜːd/noun
the Allerø d
- Geology the second climatic stage of the late-glacial period in northern Europe, between the two Dryas stages (about 12,000 to 10,800 years ago). It was an interlude of warmer weather marked by the spread of birch.【地质】阿累鲁期（欧洲北部后冰川时期第2个气候期, 在两个玉木时期之间, 约12,000-10,800年前, 是以桦树繁衍为标志的较温暖时期）。
词源
1920s: place name near Copenhagen in Denmark.