Canto 1 - Boyhood
Bāla-kāṇḍa
Chapter 37: The History of Skanda
Text 1.37.21
तदेतद्धरणीं प्राप्य नानाधातुरवर्धत॥
tad etad dharaṇīṁ prāpya nānā-dhātur avardhata
tat etat = when all these; dharaṇīm = the earth; prāpya = touched; nānā-dhātuḥ = various valuable minerals; avardhata = were formed.
When all these touched the earth, various valuable minerals were formed.
This is a summary [of what was described].