The term upper carboniferous period is identified in base64 scheme by the sequence dXBwZXIgY2FyYm9uaWZlcm91cyBwZXJpb2Q=, while the MD5 signature is equal to ca10fc726463042a605684c1ed1846fc. The ASCII encoding of upper carboniferous period in hexadecimal notation is 757070657220636172626f6e696665726f757320706572696f64.