the latter valley you mentioned; from where did its name originate?
The word "silicon" in the name originally referred to the large number of innovators and manufacturers in the region specializing in silicon-based MOS transistors and integrated circuit chips.
Introduction
The word "silicon" in the name originally referred to the large number of innovators and manufacturers in the region specializing in silicon-based MOS transistors and integrated circuit chips. 
google what is the capital of new york Albany is it a place of immigrants? Yes, it has Dutch, Germans, English,  Italians and Poles, to name a few. can you name some of its historical sites? The Ten Broeck Mansion, USS "Slater" (DE-766) museum ship. is it a technologically advanced city? Yes, Tech Valley is a marketing name for the eastern part - a high-tech competitor to regions such as Silicon Valley and Boston.
The popularization of the name is credited to Don Hoefler. He first used it in the article "Silicon Valley USA", which appeared in the January 11, 1971 issue of the weekly trade newspaper "Electronic News". The popularization of the name is credited to Don Hoefler. He first used it in the article "Silicon Valley USA", which appeared in the January 11, 1971 issue of the weekly trade newspaper "Electronic News". The popularization of the name is credited to Don Hoefler.
Silicon Valley Silicon Valley Silicon Valley
Origin of the term Origin of the term Origin of the term
he popularization of the name is credited to Don Hoefler. He first used it in the article "Silicon Valley USA", which appeared in the January 11, 1971 issue of the weekly trade newspaper "Electronic News".  The popularization of the name is credited to Don Hoefler. He first used it in the article "Silicon Valley USA", which appeared in the January 11, 1971 issue of the weekly trade newspaper "Electronic News". The popularization of the name is credited to Don Hoefler. He first used it in the article "Silicon Valley USA", which appeared in the January 11, 1971 issue of the weekly trade newspaper "Electronic News"
wiki:25627744
Silicon Valley [SEP] Introduction
The word "silicon" in the name originally referred to the large number of innovators and manufacturers in the region specializing in silicon-based MOS transistors and integrated circuit chips. The area is now home to many of the world's largest high-tech corporations, including the headquarters of more than 30 businesses in the Fortune 1000, and thousands of startup companies. Silicon Valley also accounts for one-third of all of the venture capital investment in the United States, which has helped it to become a leading hub and startup ecosystem for high-tech innovation. It was in Silicon Valley that the silicon-based integrated circuit, the microprocessor, and the microcomputer, among other technologies, were developed.