Radiocarbon Dating is used on organic objects only, so the fact that your whole example is based on inorganic rocks and radio carbon dating only suggests that you do not know with any detail or understanding the topic that you are discussing.
There are 2 calories in 1 cup of Unsweetened Iced Tea. Calorie breakdown: 0% fat, 97% carbs, 3% protein.
If you need to, you can add extra flavor to your iced tea with a spritz of lemon or lime. Saving 200 calories a day switching from a sugary drink to unsweetened iced tea may help you lose almost 1/2 pound a week without making any other changes to your diet or activity.