Doesn't hurt at all not having any math/stat profs. Generally, what graduate committees seek answers from LORs are:
(i) Student's background
(ii) Student's interest (drive, motivation, etc)
(iii) will he/she be a suitable fit into the program
You have to understand, a very common misconception from people about math and statistics is that they are deadlocked and theoretical (only black and white... yadda yadda yadda). A lot of people may refute this post but math is the mother of all sciences... So I believe that having LORs from a chemist, physicist and geologist each shows how rich your research base is. Your uniqueness: dynamism
With strong mathematical background, it's a plus point applying for statistics. To be honest, I'm totally no where on earth close to the cream of the crop so schools like Harvard, John Hopkins, Cornell, Yale (list goes on and you know it...) etc etc, are beyond even my wildest dreams (doesn't hurt trying... you'll never know). Here's a list of ranking from USN which I refer to.
http://grad-schools....istics-rankings
Good thing you are learning SAS. Very powerful software! Ever considered real analysis? It's fundamental for statistics
Hope it helps. Good Luck!