Ashlar is the planet the Oberon crash-landed on.
One billion years ago, comets bombarded on Ashlar, causing great pain to the dominate lifeform - Great Nest, a species of brachipods controlled by a insectile hive-mind known as the Core. This leaves the planet covered in massive craters that, over time, form mountainous valleys.
This was revealed in Planet of the Apes: The Fall.
|Planet of the Apes - The Chronicles of Ashlar|
|Planet of the Apes TB|
|Planet of the Apes (2001)|
|Thade | Attar | Ari | Krull | Limbo | Zaius | Sandar | Nado | Nova | Pericles | Semos|
|Leo Davidson | Daena | Birn | Gunnar | Karubi | Tival|
|Grace Alexander | Aspasia | Bon | Chimpanzee Soldier | Frank Santos | Girl Pet | Gorilla Kid | Hansen | Leeta | Lola | Marduk | Maria Cooper | Old Ape | Thade's Niece | Tuug | Karl Vasich | Woman in Cart|
|Ashlar | Calima | Oberon | Derkein|
|Comics, Novels & Magazines|
|The Human War / #1 / #2 / #3 | Planet Of The Apes (2001) Graphic Novel | Planet of the Apes (2001) (Junior Novelisation) | Planet of the Apes (2001) Concept Art & Costume Tests|
|Planet of the Apes (2001 Soundtrack Album)|