Cordilleran Ice Sheet dates back 4 million years.
Angkola , or Batak Angkola , is an Austronesian language of Sumatra .. Batak. Batak script. Austronesian language. Austronesian languages. Sumatra. Sumatra. It is spoken in South Tapanuli Regency and Padang Sidempuan .. South Tapanuli Regency. South Tapanuli Regency. Padang Sidempuan. Padang Sidempuan