第一句：MALE PROFESSOR: Since Earth formed, some four and a half billion years ago, the number of minerals here has increased dramatically, from a few dozen relatively simple minerals early on...to over 4,300 kinds of minerals we can identify today-many of them wonderfully complex.

教授: 自从地球在45亿年前形成开始，地球上的矿物种类的数量就发生了急剧增长，从只有仅仅几种相对简单的矿物质增长，到4300多种我们现在可以识别的矿物，其中的很多矿物很复杂。

第二句：

MALE PROFESSOR: And as conditions change, minerals sometimes break down and their atoms recombine into totally new compounds,as part of a process some call mineral evolution.

教授: 随着环境的改变，它们的原子重新组合，成为新的化合物，这就是一个称为矿物质进化的过程的一部分。

请问老师，第一个some是adj，used to refer to  person or thing that is not known, name,or specified 吗？

第二个是 some是adv, 是 : to an unspecified amount or degree 吗？

   Would you like some more potatoes?

   I need to work on it some more.

  — often used informally in U.S. English without more

   He needs to grow up some before he can live on his own.

   The cut bled some. [=a little]

   He helped me some.