| 1. | Siliceous ooze are modified and transformed during burial into bedded cherts.
|
| 2. | This genus is characterized by a high density of siliceous spicules.
|
| 3. | The carnelian is a siliceous stone and a species of chalcedony.
|
| 4. | To the north of Pauna, it has a siliceous character.
|
| 5. | The redeposited cementing material is most commonly calcareous or siliceous.
|
| 6. | Siliceous oozes often contain lesser proportions of either sponge silicoflagellates or both.
|
| 7. | Siliceous spicules come in two sizes called megascleres and microscleres.
|
| 8. | They mainly can be found on northern exposed siliceous or calcareous rocks.
|
| 9. | Biogenic silica occurs in the structure of diatoms, radiolaria and siliceous sponges.
|
| 10. | These may be organic or siliceous and come in various shapes and sizes.
|