The term upper carboniferous is identified in base64 scheme by the sequence dXBwZXIgY2FyYm9uaWZlcm91cw==, while the MD5 signature is equal to 4a98bbc9e067625182b133043825ce5e. The ASCII encoding of upper carboniferous in hexadecimal notation is 757070657220636172626f6e696665726f7573.