The term porphyritic rock is identified in base64 scheme by the sequence cG9ycGh5cml0aWMgcm9jaw==, while the MD5 signature is equal to 47f9841621a22fda4f1f466329a73dae. The ASCII encoding of porphyritic rock in hexadecimal notation is 706f72706879726974696320726f636b.