Shígǔwén shì dàzhuàn de dàibiǎozuò, zìxíng bǐ hòulái de xiǎozhuàn fùzá de duō.
The Stone Drum inscriptions are a classic of great seal script, with forms far more complex than the later small seal.
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history
In the narrow sense 大篆 is 籀文, the script of a Zhou-dynasty character primer; broadly it covers all the pre-Qin forms, including the 金文 cast on bronzes. Under the Qin, 李斯 simplified it into 小篆.