The twelfth chakra is composed of 32 points on the body and tha aura. Here is the list of the points from Cyndi Dale's book. Some may partially overlap with some of the major chakras as they are to be found very close to them:
1) Legs
2) Buttocks
3) Coccyx
4) Sacral vertebrae
5) Lumbar vertebrae
6)Thoracic (dorsal) vertebrae
7) Cervical vertebrae
8) Cranium
9) Silver cord to the soul
10) Bubbling springs in the feet
11) Ankles
12) Knees
13) Thighs
14) Hip bones
15) Navel and sexual organs
16) Appendix
17) Kidneys and adrenals
18) Large and small intestines
19) Pancreas
20) Liver
21) Gall baldder
22) Spleen
23) Stomach
24) Diaphragm and lungs
25) Arms
26) Bubbling springs in the palms
27) Wrists
28) Elbows
29) Clavicle
30) Throat (including larynx, thyroid and tongue)
31) Upper brain (spiritually oriented functions involving cerebrum, pineal, pituitary, hypotalamus and thalamus glands)
32) Center of the earth