GetSPFieldDetailsForAllLists

function GetSPFieldDetailsForAllLists($SiteCollectionURL)
{
    $site = new-object Microsoft.SharePoint.SPSite($SiteCollectionURL) #Change site URL#
    $web = $site.openweb()
   
    foreach ($list in $web.Lists) #Get all list in web
    {
        foreach ($view in $list.Views) #Get all views in lists
        {
            $spView = $web.GetViewFromUrl($view.Url) #Grab views URL
            Write-Host "List Name: " $list.Title  ##Print List title
            Write-Host "------------------------------------------------------"
            Write-Host "Field Name | Field Title " -ForegroundColor DarkGreen
            Write-Host "------------------------------------------------------"
            foreach ($spField in $spView.ViewFields) #Loop through all view URLs and get Fields (columns)
            {
                foreach ($field in $list.Fields) #Get all fields in lists
                {
                    if($spField -eq $field.Title) #if field in lists equals field in views
                        {
                            Write-Host $spField " | " $field.Type -ForegroundColor Green #Write out each field (column)                        
                        }
                }
            }
            Write-Host "------------------------------------------------------"
            Write-Host " "
        }
    }
    $web.Dispose()
    $site.Dispose()
}