The term argillaceous rock is identified in base64 scheme by the sequence YXJnaWxsYWNlb3VzIHJvY2s=, while the MD5 signature is equal to d8e582ab280c2085af74cd4cf3951120. The ASCII encoding of argillaceous rock in hexadecimal notation is 617267696c6c6163656f757320726f636b.