Words to Describe subzones

How subzones often is described ("________ subzones")

• upper
• ecological
• distinct
• smaller
• numberless
• various
• many
• central
• western
• several
• lower
• ammonite
• higher
• eastern
• northern
• arctic
• coastal
• boreal
• separate
• adjacent
• topographic
• subarctic
• numerous
• different
• individual
• major
• southern